That they don't chase free users is an advantage to those of us who pay. For about $50 per year, I get rock solid, feature-rich email as well as fast support from real people who are informed and empowered.
It's not for everyone, but it's worth it if you value your mail and time.
Ya, been a user since 2009. I’ve been really happy in those nearly 11 years. The price has gone up, I originally paid $35/yr, it is now $45 (less if you pay several years in advance) but still generally worth it.
My only complaint is that the more they extend JMAP the more I want a dedicated email client that supports it, and none do as far as I am aware.