I don't think that is true, especially for Windows 7. But there are other issues to consider. Windows 7 is from 2009 and is still supported until 2020 (!). There is no Linux distribution outside RHEL and probably SLES that provides such long support cycles.
And even the comparison with RHEL is not really fair. New applications will continue to be compatible with Windows 7 for many years, while with RHEL you are mostly stuck with what you get with a particular version. EPEL et al. do provide some relief.
Suggesting that Xubuntu is a viable replacement is disingenuous - Xubuntu 12.04 LTS is supported until 2015. Let's take vanilla Ubuntu 12.04 for the sake of the argument. It's supported until 2017. A large organisation will not deploy a new system when it is released (many organisations are migrating to Windows 7 four or five years after the release). So, let's say that they deploy it now. That's only good for three years of support. So, in three years you have to redo the whole migration. Users have to be retrained now for GNOME 2 and in 2017 for Unity. You see where it is going, it is a mess.
Of course, then there is the issue that many existing Windows software doesn't work on Linux, compatibility of LibreOffice with Office documents, etc.
Linux on the enterprise desktop is usually not a viable option, except if you already have good infrastructure to support and maintain it (e.g. Google), or for a subset of users (e.g. developers).
> supported until 2020 (!). There is no Linux distribution outside RHEL
The RHEL derivates such as CentOS or Scientific Linux provide such long support.
> that many existing Windows software doesn't work on Linux, compatibility of LibreOffice with Office documents, etc
There is Wine which allows to run Windows programs on Linux just fine. I am still using Office 2000. Compatibility is also problem with newer Windows and I would say that in long run Linux will be more compatible with WinXP than Windows themselfs. Microsoft seems very eager to drop old functions to boosts its sales.
You are also forgetting that upgrading Linux is usually much easier. MS is changing UI every version and it requires retraining users and administrators.
> There is no Linux distribution outside RHEL and probably SLES that provides such long support cycles.
The article talks about an indian, debian based distribution called BOSS[1]. No doubt the company providing it will be more than happy to also provide long term support, or easy migrations as part of a huge support contract with the indian government.
But isn't the main problem with using an unsupported version of windows security vulnerabilities which are impossible to patch? This isn't true for Linux in any sense. If by "support" you mean tech support, then you don't really need an "official maintainer" for that.
There isn't much of a training cost associated with upgrading to Windows 7. The Start Button has been replaced with a round icon, true, but it's in the same position and the start menu, itself, operates much as the one in Windows XP. Upgrading to Windows 8, yes, is a much more involved process and would involve much more user training.
But, really, that's just sidestepping the issue. The real issue is that user documents are in Microsoft Word, Excel and Powerpoint formats, and, despite improvements, Open/Libre Office support for those documents is not nearly good enough to support moving to Linux full time.
This actually leads to another question I've had. We see all these announcements about cities, states, and regional governments moving to Linux. Of those, how many actually go through with the move? How many have stuck with Linux 2 years out? 5 years out? It's impossible to say whether Linux is actually viable on the (corporate) desktop without knowing if these Linux migrations ever actually take place, and, if they take place, whether Linux manages to stick, or if there's another migration back to Windows once it becomes clear that Linux doesn't yet do the job for end-users.
> How many have stuck with Linux 2 years out? 5 years out?
IT@School (see another comment for details) seems to have stuck with it for at least 6 years, to go by the retrospective on their webpage [1]. And they show no signs of migrating back to Windows yet.
It may have helped that in this case, there was (AFAIK) no widespread officially sanctioned use of Windows for governmental purposes to start with. I don't think MS could get their foot in the door in any meaningful way before the FOSS spirit took over. I do faintly remember MS trying to lure the government with nominally priced e-governance offers, though.
And even the comparison with RHEL is not really fair. New applications will continue to be compatible with Windows 7 for many years, while with RHEL you are mostly stuck with what you get with a particular version. EPEL et al. do provide some relief.
Suggesting that Xubuntu is a viable replacement is disingenuous - Xubuntu 12.04 LTS is supported until 2015. Let's take vanilla Ubuntu 12.04 for the sake of the argument. It's supported until 2017. A large organisation will not deploy a new system when it is released (many organisations are migrating to Windows 7 four or five years after the release). So, let's say that they deploy it now. That's only good for three years of support. So, in three years you have to redo the whole migration. Users have to be retrained now for GNOME 2 and in 2017 for Unity. You see where it is going, it is a mess.
Of course, then there is the issue that many existing Windows software doesn't work on Linux, compatibility of LibreOffice with Office documents, etc.
Linux on the enterprise desktop is usually not a viable option, except if you already have good infrastructure to support and maintain it (e.g. Google), or for a subset of users (e.g. developers).