Used to be that there was just xyzzy.COM, xyzzy.ORG xyzzy.NET and a few others. xyzzy.BIZ worked its nose under the tent and now we have a plethora of top-level domains.
I just ran into a canonical list of all the TLDs available now (over 150) and there are some fun ones but there are some silly ones too.
You can register your domain as xyzzy.TECH if you want - that is kinda cool. Some others include .ACTOR, .BAR, .BEER, .BEST, .BLACKFRIDAY, .CATERING, .CODES, .COOL, .GRATIS, .PIZZA, .TIRES, .VOYAGE, .XXX, etc...
What gets me is that if you don't remember the name of the domain that well, you can try it as somename.COM, somename.NET and see if you can find it. Adding 150 additional choices will dilute the ability of someone to find you in all the "noise" of the other domain names. What was intended to be a feature may well turn out to be a bug.