Second self-hosted mail server in 2 days. Are people really hosting their own mail servers? Why? I did this for about 10 years and mostly it was uneventful and

Second self-hosted mail server in 2 days. Are people really hosting their own mail servers? Why? I did this for about 10 years and mostly it was uneventful and worked fine. HOWEVER, a little less than once a year it would break and I would suddenly not be receiving emails and would have to scramble to fix me mail server when literally anything else would be a better use of my time. It was a good learning experience, but kinda pointless tbh. There are so many free/cheap very reliable maintenance free (for me) options for email that I can't for one second understand why anyone would host their own (even as someone that did for years).