Async Views in Django 3.1 6 years ago
Techempower benchmark: https://www.techempower.com/benchmarks/#section=data-r19&hw=... makes the difference between async python frameworks and sync frameworks pretty clear.
Async results in better utilization of system resources... since there aren't entire threads with app state blocked on IO requests (which would consume a chunk of system memory.)
Considering that a web app is most commonly waiting for a database operation, a single server can serve many more active requests simultaneously (since each active request is not allocating an app instance.)