I will concede that
Laptops no longer mine BTC directly and are obsolete if you want to say I am wrong about laptops fine. I am wrong . I am also wrong about GPUS and CPUs
They don't make money with cheap power.
You are such a senior member, I am sure you have sufficient knowledge about crypto way more then me.
Sir, electricity is no more cheap in most parts of the world. Its expensive specially in under developing counties.
I don't think earning one dollar after running miner for whole day is a profitable thing.
the s9 is dirt cheap Under 100 USD with a power supply and earns 14 x .0775 = $1.08 USD a day
But I do surrender in front of your arguments since you are a senior member here ;-)