Had a few minutes to expand on this idea: my JV +rack probably weighs in @ 6-10. lbs plus 10 lbs.for controller/case.
Roland(Juno Stage,BK 5); KORG( M),Yam (MOX) all 61 keys < 15 lbs. with decent stuff.That Yamaha add;guy with an A frame stand,3 different keys,and looked like 50 cables (strewn around like spaghetti around his feet) -having been there/done that-will pass.
With all the downsizing of gear;long term I think the computer will take over.(not my choice-reality).
I think Muse + Peavy have a down sized version of the Receptor-sort of a hybrid between rack gear/computer for <1k.I think it does VST/plug-ins,etc..Interesting blend of technology.
I think the manufacturers are putting out cool stuff to cater to studio vs,traveling gigs.Hope that helps man.