tbh I was thinking about this today, and I think there is some merit to having the setup be slightly obtuse so that more of the people on any given thing are the kind of people who think this kind of tech is important, rather than people who don't give a shit about that.
At least, I like when spaces are more densely that kind of person. But other people should have nice things too I guess.
I wish I remember where I read this recently, but supposedly any email provider outside of like the main 5 will have a lot more trouble getting through gmail spam filters, which is a major push towards getting people to use gmail or one of the other main providers