I've been running mail servers and writing email software since the dialup days of 1995. I guess by today's trends, that could brand me a holdout.
But we're still hosting mail for hundreds of company domains across dozens of mail servers, all in a nicely packaged system that's always just an "apt install" away.
The landscape has changed over time, and, yes, it is annoying dealing with the imbalance that the behemoth mail providers represent these days.
But there's a lot to be said for not bargaining away your digital autonomy.
I saw @mwl selling his "Run Your Own Mail Server" book and jumped to pick up a copy. Not so much because I had a need for it (though it'll be interesting to compare notes!), but because I strongly support the idea that email is still a shared ecosystem and love that Michael is sharing the knowledge to encourage folks to continue to participate.
Long live the open Internet.