There definitely are people out there in this thread proposing clients be able provide UUIDs. I’ve seen it elsewhere too.
I’ve also personally experienced UUID collisions due to badly set up VM environments under Windows. It isn’t a good idea to blindly trust any value - and that includes supposedly ‘never collide’ id’s like UUID.
For what it’s worth, I also had the joy of debugging someone’s distributed hash table that was using md5 as the hash bucket key (this was... 2 decades ago?) and had no way to handle collisions because obviously that is impossible.
I’ve also personally experienced UUID collisions due to badly set up VM environments under Windows. It isn’t a good idea to blindly trust any value - and that includes supposedly ‘never collide’ id’s like UUID.
For what it’s worth, I also had the joy of debugging someone’s distributed hash table that was using md5 as the hash bucket key (this was... 2 decades ago?) and had no way to handle collisions because obviously that is impossible.