They just had their first major overhaul in the last decade+ and are looking pretty shiny:
Personally I haven’t had a chance to check it out because I just use my browser for personal email & my work mail is hosted through Microsoft so there’s no pretending not using Outlook at work does anything for me.
That said, I am eagerly waiting for them to give the same treatment to the soon-to-be merged Thunderbird & K9 mail so I can use that for my personal mail on my phone
i have some clients using thunderbird. i scrambled to get prepared for the onslaught of phone calls when theirs got auto-updated to the new ui. all for naught. didn’t get a single call from anyone getting ‘lost’. they did a good job with the refresh.
I use Thunderbird for it’s spam filter and have some very in-depth email filtering rules configured for some old emails that receive large amount of spam and phishing emails. I don’t open it super frequently, and honestly didn’t notice when it got the UI overhaul (I think it was slowly over a few updates, but I honestly don’t know) but i do really like rhe direction its heading
