What is the purpose of binding each file to a particular loop?

[rhelmot]

It's somewhat inconvenient that AsyncBase._loop exists - it makes it hard to implement a global stdout object via a module-level stdout = aiofiles.threadpool.wrap(sys.stdout). What is the purpose of this attribute? If it is purely for performance reasons, would you accept a PR that changed all references to self._loop to self._loop or asyncio.get_running_loop()?

[Tinche]

I don't remember, it's been a long time.

I wouldn't mind merging a thought-out PR if it solves your problem.