I pay for a perceptual license of Zimbra.
There was a moment when my son was born and he was in NICU that my mail broke. I just went without for a while. Not ideal.
Since then I've thought: self hosting is nice but hosting cooperatively is probably the best way forward. Democratic control might beat technical control. I'll do it soon, I think: I'd be fascinated to know what people think.
I’m currently working on a cooperative “lights-on” solution which might be complementary.
I did test email selfhosting before and there’s a substantial amount of times my emails were never seen by the recipient, sometimes it did cost me good jobs/deals.
So now I use paid email while I control the domain and everything else, so I have the portability feature if I wanted to switch providers without any efforts, but I know now my emails will be delivered whenever I hit sent.
That being said, I self host everything else in my digital life, and I believe everyone should.