But they do need special maintenance, compared to Teflon pans or ceramic pans, they are the most finicky and hard to work with.
There are a lot of things people have done for centuries. Being old doesn’t make something superior.
The problem with the people who prostletyze cast iron, is they usually assume that everyone cooks like them, but the reality is that cast iron is generally a pain in the ass. I mean just the fact that you need to cover the entire pan in oil Every time you put it away should be enough of an indicator.
I hate cast iron, but ‘seasoning’ is just a misnomer that was adopted to refer to the oils polymerizing on the pan. The oil (usually something like canola) is literally bonded to the metal.
Not cleaning a cast iron pan is gross, fats left in the pan will go rancid.
The only soap you can’t use is lye based as that will strip the seasoning off.