NOTHING breaks flow better than "Woops! Times up!"; it's worse than credit quotas -- at least then I can make a conscious decision to spend more money or not towards the project.
This whole 'twiddle your thumbs for 5 hours while the gpus cool off' concept isn't productive for me.
'35 hours' is absolutely nothing when you spawn lots of agents, and the damn thing is built to support that behavior.