That jumped out to me as well. Even using something like Thunderbird with GMail (even though you really should try moving somewhere that respects your privacy) has such a better feel to it.
Yes, exactly. I'm still in that intermediate position myself. I'm using Thunderbird and K9-Mail as clients for my Hotmail Account (Microsoft).
It's seems like so much work to move away from the email account I signed up for some 20 years ago, so I've still shied away from doing it so far. At least I started using a password manager a few years ago, so by now I have a list of services, that would require updating.