I feel like Win 10 default apps just waste so much screen real estate. I've been using Thunderbird for years and while 5 years ago I would agree the user interface is obtuse the refresh that happened a few years back really improved things. I've also never had stability problems and I have thunderbird tracking 7 email accounts with hundreds of thousands of emails total (I'm a data hoarder)

Evolution on the other hand, hoo boy, I have to use it at work and despise it lol. That program gives me stability problems and frequently fails to interact with Exchange. Gives me a great excuse for missing meetings haha

All said, Outlook desktop I think is superior to both Thunderbird and Evolution, I just don't wanna pay for it