[quietbritishjim]

One reason is that you often don't need to use locks. Between lines containing await (or async for or async with), you can be sure that this task won't be pre-empted to run another async task.

Another reason, if you're using the Trio async library, is that managing and cancelling multiple tasks is really easy, and you can be sure that none get lost. This update to Python brings some of that to core asyncio (but I'll stick with Trio for now, thanks).