I feel like it depends a lot on what you're using it for. I have a personal domain attached to mine with one or two email aliases that I use for a few things -

I feel like it depends a lot on what you're using it for. I have a personal domain attached to mine with one or two email aliases that I use for a few things - I get maybe 5-10 emails a week there, so super low volume. I feel like I would comfortably fit into any sane "free tier" they wanted to offer with some restrictions and low volume limits. I have been planning to move more and more of my personal email over to my personal domain (currently mostly all running on my @gmail.com address), and eventually would have been happy to pay for the privilege once I started consuming more and more resources. I'll see how I feel in 6 months if I've bothered to migrate over, but I might as well now look at alternative options.