No, this isn’t a cast iron thing. Using stainless pans, you can get nonstick effects that, in my experience, far outperform Teflon anyway. The process is called “spot seasoning.” I have cooked crispy, cheesy rice noodles with eggs with zero sticking.
I love my cast iron pans, but stainless is my daily go-to. Added bonus: use 100% copper wool to clean your stainless pan. The copper-coated wool at most grocery stores is problematic; you might get a few uses out of the coated garbage and then it starts shedding metal bits.
I just use butter to cook my eggs. I also pay attention to the bonds that the bottom of the egg form with the pan. By using a stainless turner on a stainless pan you can get between the egg and the bonds it’s forming with the pan. The more often you manipulate it and make sure those bonds don’t form, the more “non-stick” the egg is.
I usually pan flip single eggs cooked with this method because the egg slides around the pan easily.
My wife has a problem doing the same though, so I buy a couple of the disposable Teflon junk pans on a recurring basis.
I’ve been looking at the pirotech pans which are supposed to be nonstick and fully recyclable, but I’ve been unable to find a lot of reviews on them.