Most people on survey choose it was dying, and maybe the trend on how that works towards the latest market. Based on the link you shared here, I foresee more reasons why this was eventually taking out of the lime light. This was due to non profitable gains, and in fact it was costly when it comes to electricity consumption.
its crazy, look at who is registering the most blockchain patents these last few years too
most of the same groups that said crypto was a scam/bubble. banks mainly, they register 100's of patents a year for blockchain tech
they are implementing the tech all the while still ostracizing it BTC mining definitally belongs to big money now : /