What fancy equipment do you need to make jam?
A wooden spoon? A pan? A clean jar? Pretty much the same goes for pickled onions or any other preserves.
I personally love my second/third hand bread maker because it's zero effort and my oven has two settings - off and hotter than the surface of the sun. But if the oven wasn't quite so recalcitrant, I'd have been happy to keep making it in there. And having it means the OH is likely to bung the stuff in and have a fresh loaf ready when I get home
especially since I taught him how to make bread pudding with the stale bits . If I had neither, I'd make flatbreads or stove top breads with the help of an upturned saucepan.
I also like the slow cooker because it performs the same function as a warming oven in the absence of a full sized one that works. The cost of the two together is still significantly less than the cost of replacing the built in thing.
I do think that learning to start and look after a fire is a useful skill which you can't learn if your only experience of fire is setting light to a disposable BBQ.
Growing plants isn't hard. Growing them well enough to guarantee a crop at the end and your garden hasn't been taken over by one plant at the expense of others, though, not always as easy.
Understand how to read the weather would be useful. It's handy to look up and think 'I think I'll bring the washing in' before the heavens open from a seemingly clear sky or shove a jumper in your bag when it's bright and sunny because you have a feeling it might get colder tonight.
The most important skill I think everybody should have is knowing when to say 'Nah' and get somebody who knows what they're doing involved. Thus avoiding bodged DIY, dodgy electrics, standing on wobbly chairs and overreaching to paint somewhere high up, broken bones written off as sprains, that kind of thing.