[ocdtrekkie]

It's usually the right choice if the software runs on a Windows host. Why add a whole bunch of third party problems on top?

A lot of enterprise software is built in .NET for Windows, and as the expectation of web-based UIs for said software has increased... honestly I'd be surprised if IIS usage wasn't increasing in overall uses (though not in market share, for certain).

[sebazzz]

OP is obviously in some kind of bubble. IIS isn't as used as much as it used to be but it is still used a lot and not the COBOL of Web servers.