Since manolito is mentioning BatchMux, I want to give some public acknowledgement to this discussion - and I have to thank a lot its author - since it was exactely the origin from where BatchMux started: I realised that it was quite easy from my side (and someway simplicistic, if not rude), just to enter the comment I posted above, giving no positive contributions at all to the topic. Then some really interesting ideas, via PM, were exchanged...
I would say what this discussion produced, was very positive, at the end...
All the best,
SD