FACT: More flying fields have been lost due to NOISE than any other reason. Many of these fields/clubs have not been relocated/replaced.
That, in itself, is a cause for worry...and electric power makes the hobby more "tolerable" to the general public.
The main drawback to large electrics right now is the price of the Lipo batteries...at least on larger planes.
Although my largest electric is a 1.20 size Super Decathlon @ 16 lbs AUW. 2700 watts/ 3.6 HP
10 minute flight times. 30 minutes recharge.
Overall, I get more flight time in a day at the field than any glow flier I have yet seen. Between the engine troubles, dead sticks and resulting damage, fuel pickup problems etc etc ....
Some people like to go to the field and tinker with an engine. Not me. I go there to FLY !!!