Very good point about the viability of rump Ukraine with insane crashing of demographics - one of the scenarios, I guess.
Scott Ritter talked about the fact that RF allowed all this military equipment to get shipped to the front (M777 howitzers or whatever) and ... the $40B US budget coming on line soon, which worried him, and how this may pose a dramatic ramping up of war by NATOstan. I hope he is wrong and that the corruption will make the money disappear.
However, as you rightly imply, it will need trained people to use these new arms (trained in Poland) and it seems to me this may be the bottleneck.
Otoh, Erdogan sent 3000 Grey Wolves and they are probably shipping ISIS troops from Idlib as we speak. Still, the troop numbers Ukies need is huge imo (like many civilians I am just guessing and reading between the lines on alt media etc).
Martyanov reckons Donbass front will crack before that. Hopefully there will be accelerated surrenders there after Azovstal.
Also some rumours that RF will send another 50K trained troops to take care of things behind the front. They would need it, especially if they need to deal with surrendered troops etc. Fog of war - we simply don't know ...
Interesting times we live in : /