Re: That's nice dear ...
I tried Outlook. It failed the Google Calendar test, unable to display all the calendars shared with me. Thunderbird was the first client on Windows that could work with Exchange, Google, and local calendars. (On macOS, the native calendar worked).
For me, the killer app was calendar, not email. I have to be able to display all my calendars (and those of family members that are delegated to me) in one integrated view. Talking to a few of my peers, they ended up using their mobile phones for such, but given the "we own any android/iOS device that connects to our calendar" trends, that's not very attractive to me.
Biting the hand that feeds IT
