I understand it depends on electricity cost and other "future value" thinking but at what price point of ETH, people plan to stop rig?
If ETH will be PoS that will make people stop of mining it.
Mining in negative = same as burning cash on fire. Don't go full retard and mine in the negative. Your only wearing down your equipment lifespan and lighting your cash on fire.
Just turn off machine till next bull run. Or borrow 401k to buy solar or something if you love mining that much.
Solar only applies for those dedicated miners considering the area of their farm.
If their location isn't so good, it won't be worth it.