More than volatile, at some point, using GPUs is just not worth it for cryptomining. Honestly, I think that once they discovered the issue, and decided what to

More than volatile, at some point, using GPUs is just not worth it for cryptomining. Honestly, I think that once they discovered the issue, and decided what to do about it, then the ROI on mining bitcoin was already fading and people were migrating to FPGAs, so maybe they thought "things will get back to normal on its own". Turns out, the number of cryptocurrencies exploded, and many of them are worth mining. Also, every time the ROI on mining one disappears, a new cryptocurrency appears. Maybe they are just still waiting for either this problem to fix itself, by slowly ramping up production, but nothing too steep.