Aside from knowing how to deal with the heat and noise Bitcoin mining hardware is pretty much plug-n-play.
Look GPUS are perfectly fine way to mine BTC indirectly on nicehash.
I think the purity definition asked on this section is wrong.
But I do respect your right to believe in that definition.
I point 7gh to nicehash mining with gpus
makes me about 50 usd in btc a day. say 0.00151000 btc.
So gpus are a good way to make btc indirectly which this board does not approve talking about.
And dollar per watt earnings on that is decent. about 16kwatts an hour to make 0.00151 btc pre power cost.
but 5 s19's would burn 16kwatts and earn 0.001424 btc pre power cost
So to never speak of gpu mining to get btc in this section is a disservice . In my belief system. which I hope you respect as I do respect your belief system.