I was also a child in the 70s and early 80s. I remember lots of homework done by candlelight and paraffin lamp. I remember the open fires heating 2 rooms and the rest of the house being freezing. I remember the gas bottle cooker that DM bought second hand to be able to cook more than 1 kettle on the parrafin 1 ring stove to feed her family of 6 DCs under 10 years old. I remember the coal being delivered for the fires at the start of winter, and many, many days spent helping DF with collecting fallen trees and stacking logs (and later, splitting those tree stump rounds with an axe - when my feet grew large enough to fit some steel capped boots) for those fires. And also helping DF grow a lot of veg and some fruit in the garden.
Lots of those things are still possible. But lots are not. We now live in the city with far less growing space than where I grew up and no access to fallen trees to cut/season. DM has not yet passed on her paraffin lamp and they are not easily bought anymore.
But we have far better insulated houses and also better tools and resources if there are problems. Like portable solar panels to recharge battery banks so we can still power our phones and ipads, or that we can charge them from our cars. Like better candle holders that are totally surrounded to keep smallies safe. Like rechargeable torches and torches that take smaller batteries and use LED lights so last a lot longer. Hand cranked radios are available.
It's more that we have a different mindset to back then - our parents had grown up in the "make do and mend" era, so had the problem solving skills to cope with the hardships of the 1970/80s. And an ability to entertain themselves without the tv and electronics when necessary (reading, radio on batteries, crafts, cards, board games, neighbours sharing tea and chat, etc). Not all, but many areas still were very much communities and involved in each others lives or knew each other well enough to work together when necessary.
We just have to find our own way to muddle through the current issues. Plan ahead is not a bad way to go on I think, to hope for the best while preparing for the worst.
So while I am concerned at the potential for major problems, I am less worried than I was 6 months ago for the immediate future. But I have made sure that I have things fairly readily available - just in case. And we are trying to do our part by using up whatever solar power we make on sunny days for laundry and heating water etc, generally not doing laundry/using dishwasher etc in evening peak hours, doing more line drying and drying on the indoor airer than using the tumble dryer than normal winters, being even more efficient in doing lots of things in the oven when it's turned on.