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> Is it just that v7 includes a timestamp for better sorting?

Correct. The sortable nature of UUIDv7 improves database performance and index locality by helping the index be more efficient since rows are inserted in a predictable order instead of scattered randomly.

If nothing else (and there is plenty of else) it saves a lot of time knowing the order something was created when debugging.

Yes. UUIDv7 can be sorted by default in order of creation, which helps reduce fragmentation problems of randomness over time.