Comment by OutOfHere

This is why I prefer to use a random base32 string over UUID. At least you get a proper 128 bit entropy instead of just a 122 bit entropy as with UUIDv4. That's a 64x difference in collision probability. I always thought UUIDs were a toy, not for serious use. If you control the strings, you can even make a longer ID.

Also, numerous applications that use a unique ID per record frequently need to check for ID collisions. I know I do for a short URL generator.