His farm is in Venezuela... so he has cheaper then average electricity. So I doubt it is going to hurt him.
On other miners with home/hobby with regular electricity pricing it needs a bump in value. I think there will always be some hobby and home miners no matter what.
Electricity price s got nothing to do with diff growth. Even if he s got higher reward now, due to lower electricity price, it s still going to go down 20% per month if this trend continues. To tell u the truth, I expect mining diff to go up even more in case BTC price starts to push higher.
But hes paying so little he likely can run no matter difficulty for a long time. Look at Venezuela it's not the most reliable but it is always said to be super cheap.
I don't disagree that it will continue to grow. I hope it slows down some and it is a little bit. But likely company's will keep pumping out chips and that means more and more hash rate. Just the nature of the beast at this point.
If the bitcoin price rises, the mining will continue even for the low efficiency miners. The difficulty will rise with the new miners.
But is paying almost nothing on electricity he has a huge advantage here he can use old gear, or new gear. At least once a month we get someone wanting to start a farm in Venezuela. Most don't go through with it.
There are a lot of other factors that make it not the greatest in all aspects.