Perhaps you're right when it comes to scaling, but you're assuming that the system was designed correctly in the first place, which would be impressive imo. The

Perhaps you're right when it comes to scaling, but you're assuming that the system was designed correctly in the first place, which would be impressive imo. There is also a lot of failure handling and recovery that needs to be done gracefully, which I think would be complicated for a session-based system. Again, I'm no expert, just making educated guesses!