I love Python, and I love Django, but I think async support would be a bad idea personally. I’ve written a lot of things using asyncio and steered into it hard

I love Python, and I love Django, but I think async support would be a bad idea personally. I’ve written a lot of things using asyncio and steered into it hard when it was first stable, but I’ve found it cumbersome and (zooming out) pretty unnecessary in the grand scheme of things. Asyncio is cooperative concurrency where you’re supposed to politely yield back to the event loop when you’re blocking on IO, but the event loop doesn’t bawk (that I’ve seen) when things are blocking accidentally. I’ve chased a number of very real bugs around this in production and I will say it’s some of the most infuriatingly difficult to pin down set of bugs I’ve encountered to date (for example, redis is fast enough to not notice any issues until your redis query grows slow enough that you do, and at that point things behave strangely with no clear indication why). Remember, even printing things to stdout is still technically a blocking IO operation. Same with reading/writing any files. Lots of issues can crop up in weird ways with stuff like this. On the other hand, the “boring” Python threading library is preemptive concurrency, meaning your libraries can’t hold things up even if you wanted to. In general give me preemptive concurrency any day - I find it easier to carefully code around state mutations than diagnose why a library might be blocking the event loop. I haven’t noticed a massive perf difference between the two and to guarantee that I don’t have weird “you’re blocking accidentally” sorts of issues means I’ll stick with threads any day of the week. Also exception handling in asyncio land is (again just from my experience, it’s been a couple years) not great, I subscribe to the mantra of letting things crash, but things silently crashing is a deep seeded behavior change that seems to go against the Python mantra of “throw exceptions and let things fail”. For now I keep things boring with Python, and if I need massive concurrency just rewrite things in elixir (which is preemptive concurrency and the actor model which is super powerful as a combo).