It's fairly standard practice to hack in some "green thread" behaviour using gevent or similar. It's far from perfect but gets you away from the single-process-

It's fairly standard practice to hack in some "green thread" behaviour using gevent or similar. It's far from perfect but gets you away from the single-process-per-request bottleneck. If it even is much of a bottleneck in the first place - isolating each request in its own process worked well enough back in the CGI days. I suspect the real reason is that autoscaling doesn't generally play well with having thousands of mostly idle processes.