UUIDv7 is nice because it's just a variant of UUID, which are already supported in very many databases and programming languages. And even if you are writing co

UUIDv7 is nice because it's just a variant of UUID, which are already supported in very many databases and programming languages. And even if you are writing code for an obscure microprocessor where no implementation is available, the encoding scheme is well known and straightforward. ULID on the other hand depends on an uncommon encoding scheme. It is more complicated than hex encoding, so it's easy to make mistakes when implementing it. Finally, the encoding scheme is weird, because it "wastes" a few bits at the end, so if you are not careful enough you could end up in a situation where two ULIDs in text form are different but once you convert them to bits they are the same.