I've been using ULIDs heavily in my projects lately. The lexicographic sort was something I was particularly looking for, because CouchDB _id indexes are lexicographic, meaning I more often than not can just use the main index and the order it returns the items. Given these projects are "offline first" apps, a stable sort and low probability of collisions were key needs.

What use is sorting a randomly generated value? I guess you're technically sorting on creation time?

> What use is sorting a randomly generated value?

In general, order determinism. The elements in the table or list don't shuffle on every refresh.

Yes, the prefix is the timestamp.