Comment by Amezarak

For some time now, neglecting radiator coolant and power steering fluid has essentially no impact. (The service interval on my coolant is either 150k or 200k miles.) Power steering is usually electric these days. I'm not sure what would ever call for valve cover gasket maintenance, unless you're removing it for some reason.

"Topping off" with oil is not really a thing, generally, unless you have a very old car with engine problems. Nor can you put the "wrong gas" in, typically, unless you have some sort of specialty car that "requires" (you could get away with it for a long time) higher efficiency gas or you have a diesel - and someone who went the extra mile to get these will be aware.

EVs also have brake fluid, so that's something EV owners also have to pay attention to - but like ICE cars, you can pretty much can just ignore it. It's not recommended but nothing is likely to happen.