ULID – Chronologically sortable drop-in replacement for UUID

niftich's comment at https://news.ycombinator.com/item?id=12205158 , from when this was posted 12 days ago, is unanswered:

> For what it's worth, the UUID RFC actually has a provision for using random bits instead of the MAC address in a version 1 UUID [ref], which results in a similar, but incompatible structure as to what's proposed here.

> I'm not sure what this new, incompatible format buys over that one, other than a different allocation of bits between the time and random fields.

> [ref] https://tools.ietf.org/html/rfc4122#section-4.5

niftich also gave an ASCII drawing of the bitfields in a ULID vs. UUIDv1.