Ah Metroid, Metroid, Metroid.... Your stats of 80%... could be right, could be wrong - you are just throwing out BS without support. And that makes YOU the troll.
It seems you are a lottery winner, my friend which had a farm with 300 gpu's had around 60 gpus to fail in the first 180 days and around 40 gpus more to fail in the next 180 days, around 100 gpus out of 300, 33% in a year. All new retail gpus, warranty was only 30 days. A pro miner, now imagine those new trolls mining and thinking they will get rich fast ehhe and few days after they need to send their gpu to warranty and most will hear, "sorry bro, warranty does not cover mining" hehe
I really mean you are a lottery winner, you know that around 15% of gpus fail in the next 3 months after purchase, gaming on it. Now imagine mining 24/7, the card was never meant to do that, ask sapphire for the stats you will know if I'm right or not, reason they stopped honouring warranty if they find out it was used for mining. As far as I know around 60% of gpus returned to sapphire was used on mining and failed in the first 6 months in 2018.
I will rage hard over my providers and I mean hard with that amount of failures in a instant, I have the same GPUS over 3 years non stop and just 1 failed and pretty much was my fault still I got warranty for it, if your history if is true, you friend is buying crap cards, on that ones yes i believe is possible.
About the mining and GPUS its a lottery as someone said before we dont know no one knows im not sure, yes profitability is really low now to the point where I see as option stop the rigs but they still can pay they bills until that happens they will run.