And if the there were 3000, 30000 or 300000 providers the problem would be different. The example I gave was one where I have considered async but went with multiprocessing, which is also why I asked the parent commenter above if they found any direct benefit to readability or debugging when going async.

It would be interesting to hear what kind of domain are you working in where you have 3000 simulations connections to different service providers.