I can see some use cases for it, but every time in the past I've encountered other kinds of partially-sequential UUIDs like v1 or v5, they've been misused. Same

I can see some use cases for it, but every time in the past I've encountered other kinds of partially-sequential UUIDs like v1 or v5, they've been misused. Same with the hash-based ones like v3. v4 is simple and not prone to misuse.