Context: I'm a boulderer trying to learn to do other things too. Not surprisingly, I get pumped really quickly and recover poorly. I infer that my aerobic capacity is probably very weak, for starters.
I've got a fingerboard and pulley system at home, and have discovered that I can wake up, drink some coffee, and do 20 mins Aerocap (using the protocol from the Crimpd app, repeaters at 40% of your max) while still in my pyjamas and fuzzy bedsocks.
Any reason I shouldn't do this daily? It's not using time/energy I'd be spending on other training, as I'm not capable of that until I've consumed a lot more coffee, and it's separated by several hours from any other climbing or training, so there should be limited interference effects. And it's not tiring me out or affecting my ability to perform/train well later.
I can't see a reason not to, but I thought I'd put it out there and consult the wisdom of UKB.