Theoretically if that did somehow happen I’d imagine it’d just be like Amish country, they make it work without electricity and still have decently high standard of living.

Realistically though that won’t and can’t happen, we already have the knowledge, it would take something unbelievably cataclysmic to erase all traces of that knowledge from the world. Even if there was a collapse of general infrastructure people would still throw up windmills and water wheels and such to generate electricity on small scale at the absolute worst case.

People who lived in those times were equiped with the skills to survive them. If we get thrown back into a world without electricity due to an EMP or CME, the first few decades will be chaos while the average person learns how to survive, or not..

In other words, it won't be like we simply go back to the 1800s and have to produce and create using that tech, generations would have to learn all the prerequisites to even build the tools required to live.

Even if most of the people who maintain internet archives vanished in nuclear fire, there are so many published books on how to make 80% of the technology we have today from the ground up. It would take a while to rebuild the infrastructure we have now if it fell into decay for a decade or more but I doubt people would go even a day without getting videos if cats being assholes.

If the internet goes down at least a million people will make restoring it their highest priority, even over food.

Well, despite people's general lack of know-how in the first world, we have libraries spread out in every city with more knowledge in them than in any era before us so we'd automatically have a leg up on ancient times. Once the panic settled, we'd probably just be in a slightly more advanced industrial revolution era.

There's many ways to complete a task and sometimes new isn't always good. I miss my manual car with crank windows. Most of my recently purchased shop tools are around 60 years old but can be repaired with common easy to find parts. My 28 year old restored washer and dryer haven't missed a beat, ever. My toaster doesn't need Wi-Fi.

Edit: please excuse my examples that include technology. My point was we have previous methods for everything we do now.

So there's studies that show quality of life is positively correlated to energy consumption.

Without a power grid for an extended period of time, a large number of people would die. Cities, waste, food distribution, water processing, medicine, are all based on access to electricity. Heating is strongly correlated but not necessarily electric.. If electricity stays off permanently people will try to go where their is electricity to help with food, water, medicine. This creates a refugee crisis which likewise strains what resource access there is in those regions. Increasing population suddenly by a small fraction, not a big deal, doubling population in few months nightmare scenario.

Basically the population will long term reflect the food supply. Famines will kill millions.

There are few actual scenarios that would result in lose if the power grid. A solar storm is most likely, but countries that take infrastructure regulation seriously will survive. Those that don't will lose power for month's and focus on bring power back to the most people as quick as possible. Large cities will get power back In a few weeks, and rural areas probably a year or two. Agricultural equipment is mostly Fossil fuel based, so basic food production will function. Food storage and distribution is the problem. The result will be food trucks. Thousands will still die however: medical care will deteriorate one way or another and that means the old and young are more likely to die. The real question will be if electric refugees resort to literally eating the rich in their remote luxury bunkers with backup power.