Yep, I was thinking along the same lines. What if the database kept a reference to a connection for some timer or something and the connection memory later gets

Yep, I was thinking along the same lines. What if the database kept a reference to a connection for some timer or something and the connection memory later gets used for a different connection? GC languages don't have this problem because you would just allocate a fresh connection each time and the language itself guarantees that said physical memory is not reused unless it is unreachable.