It seems unlikely that there could be such an exercise. I would use this recovery time to concentrate on fitness, abs and legs

I do understand those arguments, and the US has been a true ally to Ukraine - much more than the Europeans who generally didn’t spend as much as they should have, and sometimes added additional layers of caution (Olaf Scholz in particular).

But if you take a “don’t criticize us” attitude, you won’t be open to any lessons that might be learned. The lesson I hope the West, Europe in particular, would learn is that timidity and weakness invites aggression from someone like Putin.

Yes, it does add up to a lot, but it always came in just enough to keep Russia at bay. Also the permissions around where and how which weapons could be used.
When Russia invaded, Putin had no idea how corrupt, weak and inefficient his forces were.
This trickle allowed Russia enough time to turn around much of that, getting us to the point where they are now severely threatening Ukraine. If the military aid was more decisive, Russia could have been defeated early on, and the total spend could have been less than where it is now.