Ultimately Email is old technology, all the web frontends just get in the way more or less.

I use an email host that has roadmapped switching their frontend to one I don’t really like, so figured I’d get ahead of the curve and switch to a client that was open source and compatible with the typical standards — so I could learn it and never have to deal with another client again.

Ended up using Thunderbird, even for my old inboxes at the typical web companies

One client, all my emails in one spot, don’t have to deal with stupid UX changes being forced on users.