Note that if you let your domain lapse and someone else registers it afterwards, that person will also gain control over your e-mail address (and likely all accounts associated with it, if they are not secured with an additional factor of authentication / recovery).

Last I tried that was over 20 years ago, and I was getting bombed with 13,000 spam emails an hour.

Though I'd imagine privately-hosted spam filtering has gotten much better since then.

That's a good idea because then you can always change your mail provider without changing your email address on all websites

With your own domain you also can also make up email addresses on the fly anytime.