I have my own domain, and use gmail for free. Because I'm cheap, not because I care. One day I'll find a better solution, one that avoids Google (paid or unpaid) altogether.
Yeah, I got mine for free too since I've had my domain for a while, but I have a newer domain that I set up on GSuite, and was paying $5/mo for, until I realized I could set it up as a domain alias of my original domain and get it for free.