If a developer's goal is to have “sequential” GUID primary keys generated for faster performance, either by EF Core or the SQL Server’s NEWSEQUENTIALID, what is the expected behavior in EF Core 5.0 ...

If there is a guid in the clipboard then it will put a formatted guid in the clipboard. If there is a 0 or f in clipboard then it will replace it with a guid that's all 0 or f.