They are expanding and are going to continue expanding regardless of how their power needs are met.
And this is exactly the problem we should focus on. They should not be allowed to expand like that. Either we are in a situation of emergence or we are not. Just stop them, make the political decision to stop them.
I would much rather we switch 100% to wind, solar, geothermal rather than ditching the internet.
Run the numbers, everything we don't do now to reduce the CO2 emissions will be paid a hundred times more later. Megafires, megadraught, etc.