People should read the parent post and stop spreading FUD about email. The only part that isn't easy is the IP requirement. If you don't have a fixed public IP, preferably v4, then self-hosting email is out of reach, but so is hosting other things like game servers. It's the main cost of self-hosting, and one that isn't big relative to all the benefits. Privacy is the biggest one I think, and so is the ability to create unlimited aliases, one for each company/website.

Dynamic DNS clients are a thing. I host a bunch of stuff on my domain, the only issues I have are related to having a local address when I'm at home. I don't host game servers much, but I hosted terraria (tshock) for few a few years.