I guess when the altseason comes back in full force then people will start mining with their GPUs again.
You need the mother of all alt season to come back to make people profitable with GPU again, there are two main problems:
A brand new 4090 makes 0.83 USD a day, and costs at best deal $1500, that's a 6 year ROI, before power.
At 5 cents per kwh and bringing the ROI back to one year, you will need an increase in the price of minable altcoins of over 12 times!!!!!!
Second, there are thousands of miners who just abandoned the rigs in their garages and are also waiting for this season, currently, the whole GPU mining rewards are slightly less than half a million in best days, before that ETH was bringing in 40 million. So if just 10% of the miners have kept their gear is going to add even more pain as you need again an increase in price over those 12x.
Not to add that profitability means ASICs being developed for that algo!