[maxcoder4]

Honest question, what's wrong with Thunderbird? I never used Outlook, and I use Thunderbird daily so I wonder what I miss [1]. It also picked up development a bit and got some nice improvements, maybe check it out of you didn't recently. But I'm really curious why is it bad.

[1] I'm pretty sure outlook users miss good GPG support, at least.

[briHass]

Supernova has fixed a number of the performance issues with large mailboxes, but that was fairly recent. People steeped in Windows still prefer the sleek/modern UI in Outlook over TB, in my experience, but the biggest benefit in Outlook is just the tight integration in MS/365 land.

Calendaring in TB always felt like a bit of an afterthought compared to email, and for personal use, that makes sense. For business, strong calendaring with meetings/shared calendars/availability and the tight link to meetings (Teams)is not done as well anywhere else.