The problem with all that is, the Internet is a key component of a societal framework that is unsustainable, IE industrial civilization.
Um. Industrial civilization was unsustainable in terms of nonrenewable resource consumption in 1900, and 1910, and 1920, and 1930, and 1940, and 1950, and 1960, and 1970, and 1980. Then industry/govt/scientists got on the Internet. Industrial civilization remained unsustainable in 1990. Then everybody got on the internet. Industrial civilization remained unsustainable in 2000 and 2010.
The Internet is a key component of communications. Communications are used in industrial civilization, of course, but also in everything else---family, education, government, etc. Did pre-industrial people not try to communicate? No, they communicated as much as they could afford to. They spent small fortunes on it, they complained incessantly about how slow it was, and they leapt hungrily on any technology that made it cheaper and quicker.
It doesn’t take a rocket scientist to figure out that any way of living that’s based on the use of non-renewable resources won’t last.
Energy is not a non-renewable resource. Fossil fuels are. Computers don't care whether their energy is fossil or non-fossil.
Using a computer is not inextricably entwined with non-renewable aspects of civilization. You are inventing this intertwinement out of thin air. Yes, computers are consumer products---so what? Does "consumer product" mean "unsustainable" in your mind? Horseshoes, bags of wheat, plots of land, flints, paper, pens, firewood, and anything else that non-hunter-gatherer humans use can be consumer products. Anything that can be used can be bought and sold.
I can perfectly well imagine an indefinitely sustainable civilization consisting of industrial-scale farmers and crowded-city-dwellers, whose drastically-reduced net energy needs are supplied (somewhat expensively to be sure) by solar, wind, hydro, and nuclear. I'm sorry you can't. Maybe if you could imagine it you could help work effectively towards it.