You do realize if this your strategy, you must own that domain FOREVER. Whomever purchases that domain after it expires now owns all your email aliases. Assuming you do a good job of changing all your emails at every service you ever used, there is still that potential leak. Large cloud services such as google do not allow name reuse. Of course paying for a domain name forever is probably still a better idea than a provider who can be purchased, but just a reminder!!
It’s a good call out. I’m glad that I used one domain instead of scattershot across all the ones I’ve owned: at least I’m only bound to renew the one domain. It’s a cheap TLD and hopefully it stays cheap!