I'll be honest -the proliferation of hicaps is one of the reasons I've more or less stopped playing (I'm down to about 2 games a year now). I don't milsim, but when I started Airsoft even skirmishes had enforced ammo limits.
The last couple of years nearly every skirmish I've gone to has degraded into a long-range-everyone-has-support-weapons-so-nobody-moves shitfest.
It's absolutely no fun to play when 2/3 of the people playing are packing 1,000+ rounds and don't even need to worry about ammo expenditure.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."