This is a broad question and depends largely on what you want to do.
I don’t think there a ready answer for that (maybe some people have experience but that might not directly translate to your use case). the only thing that you could do is build a small scale solution test it/scale it. Only then you can understand which component becomes a bottle-neck (better than just accepting/reading things and making wrong assumptions )
yeah I think it’s about to be the dump question I’m planning to test it on ecs but just wonder if someone has got an experience using it as the chatbot as service with some VPSes