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.
Maybe your friend is an idiot and drools over gpus without noticing, I could see that.