Yeah, but you're not beholden to them. There are 100 different hosts you can use if you own your own domain. If a host changes in a way you don't like, just move your domain elsewhere. If you're using Gmail, you're stuck with Google. Being independent of any one host is the important part to me.

Personally I have my own mail server and use smtp2go for sending which handles the deliverability issue. I'm not sure it's worth it going this way but I found it fun and its been 0 maintenance