[objectified]

Lots of problems are merely I/O related, which can be solved just fine with Python threads. As for number crunching (let's assume that means CPU intensive tasks), you can always still resort to multiprocessing (which can also be combined with multithreading, I fail to see why such paradigms cannot be combined).

[heavenlyblue]

Well, io-related problems can be solved even better by using gevent.

The io-related problems I had with paramiko, on the other hand - last time I checked could neither be solved with threads or gevent.

So that’s a weak point to be made anyway.