It’s amazing how much worse outlook got and how fast it got so much worse. It also can’t handle screens with different scales, it sometimes inexplicably fails to render an email, printing can produce files of different size - using the web version produces smaller pdfs than the desktop version. I miss thunderbird a lot since the company forced Outlook use and also removed the classic outlook option - or maybe it only has the weird white space version now.
While I did enjoy thunderbird its lack of hability to use microsoft outlook protocol for e-mail and calendas, always keeped me from use it.
Also, to be honest, I dont trust mozilla anymore than microsoft these days.