Yahoo brought the company that hosted my email back then when they had plenty of money, and I never had a reason to stop using it.

I also have a gmail, that is completely unusable compared to it. And an email in a domain registered to me. But from those 3, the only one I don’t use regularly is the gmail.

There is an optimum size, and going above it is almost as bad as going bellow. (But larger homes don’t get bad as quickly as smaller.)