I switched to posteo. 1eur / month, does the job. Also use Thunderbird on mobile.
If people plan on switching my recommendation is not to do it all at once. Create the new email account and then slowly when you use accounts or buy something online point to the new account. It's also a good idea since you start a fresh email account to not give your email to just any random websites or services. For this I use firefox email relay that I also pay 1$ per month.

It's mostly novelty. But wears off eventually when you start noticing very obvious patterns emerge in the way it answers and quality degrades significantly as context size grows. It also will always talk to you in the way YOU tell it to which also becomes boring as time goes on.
It's always funny to me how people on the news talk about AI partners and so on when you know if they have 2 brain-cells, next month they will drop this whole stupid idea. When you're talking to it about your problems you're just talking with yourself.