- 128-bit compatibility with UUID - 1.21e+24 unique ULIDs per millisecond - Lexicographically sortable! - Canonically encoded as a 26 character string, as opposed to the 36 character UUID - Uses Crockford's base32 for better efficiency and readability (5 bits per character) - Case insensitive - No special characters (URL safe) - Monotonic sort order (correctly detects and handles the same millisecond)

ULID's claim according to their official documentation are the above of which everything is taken care of by UUIDv7 officially now. Why should I or not shift back to UUIDv7?