The GIL doesn't serialize the execution of threads, but ensures only one executes at a time. Therefore, the race condition issues you describe already exist eve

The GIL doesn't serialize the execution of threads, but ensures only one executes at a time. Therefore, the race condition issues you describe already exist even with the GIL. The GIL is only there to ensure that the interpreter doesn't corrupt Python objects and its internal data structures, which in the best case leads to a crash.