A place to discuss the news and latest developments on the open-source browser Firefox
Thunderbird is not a email provider, it's email client. Gmail is both a email provider and they have a webclient you can (but don't need to) use. You can use gmail with Thunderbird, I do that.
The question is what are you looking for a new email provider or a new email client?
It's okay. Maybe more disappointing than outlook in some ways. It has a weird hybrid approach where it's almost like a browser in some ways but I'm not seeing how that adds to the experience.
Thunderbird is very good and new additions are coming on a regular basis now. You can use it with any standard email service, and soon it will work with exchange and hopefully soon JMAP. There is also a mobile version.
I use it, it's fine. IDK if they offer email hosting.