[$] Python subinterpreters and free-threading

AtPyCon2024 in Pittsburgh,Pennsylvania, Anthony Shaw looked at the various kinds of parallelismavailable to Python programs. There have been two major developments onthe parallel-execution front over the last few years, with the effort toprovide subinterpreters, each with its ownglobal interpreter lock (GIL), along with the work to remove the GIL entirely. In the talk, heexplored the two approaches to try to give attendees a sense of how to makethe right choice for their applications.