[PaulHoule]

It's a pet peeve of mine that most email clients want to put the calendar and email list view in places where, by default, you can see one at a time. (I think Outlook started it but I could be wrong)

If I am scheduling something I have a lot on my mind including the contents of the calendar and the email, possibly other emails, other things on the computer and other things that are just in my head. Seeing the calendar and the email simultaneously is the foundation for this. There are work-arounds but these are flawed in their own way. I hate opening multiple email windows in Outlook because if I do it seems Outlook is going to keep opening them forever every time I open Outlook.

Myself I use eM client as a front end for Fastmail.

[jwells89]

I think you're right in that the trend started with Outlook, but at least for a while Microsoft offered an opt-out in the form of Outlook Express, which was just a mail client.

My preference is that email and calendar are two entirely separate apps, because I have my calendar open for about half of the emails I compose, and the remainder of my calendar usage has nothing to do with email at all. This is one of the reasons I've stuck with Apple Mail + Calendar through the years.