I played an Ibanez 6/12 doubleneck back in the 1980's and you're not kidding about the weight. It felt like I had a cinder block hanging from my neck. I loved the sounds, though. Nowadays, I rock out with a Hofner Shorty travel guitar that weighs less than 3 pounds. Not as versatile, but a lot easier on my 60-year old back muscles.
Biggest problem for electric guitarists when playing outside in bright sunlight--trying to discern what the digital readout is on the multi-effects pedal. I had to make a little tent from cardboard to put over top of mine, which helped a little, but I'm still basically guessing.