I have multiple domains and aliases, and Fastmail is much better at those than Google Apps ever was (I also have the free plan but you can never change your initial domain), so I'm much happier.
A few for friends and family as well. --Friends I can tell to pay for themselves if I need to, but family, not so much.
Edit: As for checking them, most don't get many emails, and every good email app can handle multiple accounts easily, so I get notifications on my phone.
Another issue I had was that my main email address was already in Google and Microsoft's systems for a couple reasons, and it wouldn't let me set it properly when changing my email address everywhere. So I have google@ and microsoft@ aliases just to work around their account management quirks.