Like all open source software, there's more of a build-it-yourself ethos. I was able to customize it to my liking to replace most of the functions of Outlook. Someone here mentioned the focused View which was hit or miss to be honest, but it did a good job of filtering out most of the nonsense.

It took a little bit of time to get the settings, layout, and add-ons that I wanted for my workflow. The best thing about switching is honestly how quick it is, how easy it is to have all my emails open in one window with tabs, and above and beyond all, a super powerful, super quick search. I feel like modern searches across all software are doing away with Boolean operations, thinking they can replace it with AI rankings. A straightforward search that lets me find exactly what I'm looking for and nothing I'm not feels like a superpower in this day and age.