Don't get me started on this topic! I'd argue with anyone who claimed Drones can't feed themselves. ...
The last few yrs, I've gone to foundationless & unlimited brood nest. What I got was zillions of drones. By itself, that's not really a problem. Except: when you inspect a 7 box high hive, and you find 4 boxes with open nectar, and every frame is completely covered on both sides with drones with their heads in the cells Slurping down the nectar. Meanwhile, the workers are having a terrible time pushing their way thru the mass of drones, to get any work done.... and then you end the flow with 6 frames of capped honey from the hive.
Yes sir - drones can feed themselves just fine, to my observation.
I suppose: that the nectar would have to be of a certain quality/composition for them - then ok.
... and, I could have misinterpreted what I was seeing, but I certainly don't think so.
I bought some queen Excluders for this year - for this very reason. ... so I could get some honey too!
Ugh!