We've been "preparing" our entire adult lives. Not to an extreme extent, but we always have plenty of "spare" provisions in the house, bottled water, lots of tinned/packet foods, loo rolls, etc. We also have candles, a camping stove (and spare gas cylinders), a battery radio, torches (and plenty of batteries), etc.
We are both in our early sixties and remember living through the power cuts of the 70s. We're also in a small town in a rural area, and power cuts in bad weather happen every few years for a few hours. Our area was entirely without electricity for 4 days as a result of the sub station flooding during Storm Desmond, and it even knocked out the mobile network and even our local "pulse" telephone exchange, so we had no power, and no communications. We were certainly grateful to have candles and torches, and listened to local radio on the battery radio to keep updated as to timescales, extent of the blackout, etc.
We didn't need to "panic buy" at the start of Covid as we already had a good stock of loo rolls, soap, and plenty of food/drink, so we basically just shopped as normal, sitting out those couple of weeks of utter madness at first as the shops were emptied and then started back to normal as shops returned to normal.
Certainly not extreme enough to build our own nuclear bunker or create a "safe space" under the stairs, or make tinfoil hats etc., but whatever happens, we'd be relatively comfortable for a couple of weeks if chaos ensued around us, short of being obliterated by nuclear fallout or a bomb!
Sometimes, it just makes sense to not rely on our 24/7 society where people seem to have embraced "just in time" and can't cope when what they expect suddenly isn't happening.