I think have some stockpiles makes sense. There are so many 'threats' just now.
For example we know that the hot weather/drought has effected harvests. We know their is shortages of fertiliser due to the SOH blockages. The economy is in a mess with our bond interest going up. We are likely to see increases in food prices and/or shortages. We've been warned about bad weather this winter and we have current fuel shortages which can lead to lorries being unable to deliver food, medicine etc
That's before we get onto the scary stuff - like the Russia, oops we dropped a test-tube (very ala covid style). Trump and his SOH war. Iran and their going's on. Riots in France and right wing parties being voted in Germany. Changing world order with China and the USA battling for top spots. The Ukraine war still rumbling on.
I've bought some food, water, powerbank, radio. Also a small camping stove, fireblanket and battery kettle. Yes it could all be a waste of time and money. For a couple of hundred quid though it gives me some peace of mind that I have tried to make some sensible preparations.
Already strugggling with food prices going up so I've stocked up on things I eat anyway like tinned mackeral and oatcakes. Tinned Soup and cheese oatcakes. Cereal and UHT milk. Tinned fruit which is okay is not as good as fresh/frozen but better than nothing. I have stocked up on some things I wouldn't normally buy like powdered milk and tins of meat and vegetables. Pasta and sauce is versatile although I do try to limit my carbs normally. At best prices go up and I have saved some money. At worst I just use up the stockpile a bit at a time.
I've also bought extra shampoo, deodrant, dog food, first aid stuff because it will all get used up anyway (or at least most of it).
I remember too well the Covid carry on when there were queues round the supermarkets, empty shelves and you couldn't get delivery slots for love nor money (actually you could but it involved being awake at 4am when they opened up new slots).
I also remember numerous other times when shelves were empty. Refinery blockades, beast from the east saw no milk deliveries getting through to central Edinburgh. The UK govt seems quite hell bent on taking us back to the seventies and for those of you who weren't there power cuts were just a normal event except we are far more reliant on power now than we where then with the internet etc. (Obviously the power cuts would not be because of miners strikes this time)
I think we will see some empty shelves, some fuel shortages (diesel), some power cuts. We quite likely will see some cyberattacks and systems going down. Hopefully that is all and it won't be too bad. I don't consider nukes because I don't want to live through that and an accidental release of plague would be pretty bad as well.