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.
ive been doing low fat eggs and frying fish just fine on a stainlless pan. Once throughoutly preheated, you can lower the heat and let the pan cool down a bit. Rolling oil around the pan in every direction ensures all the pores have been properly hit with oil.
My eggs stick less to my stainless than to my 3 year old very expensive teflon plan that has been treated properly and still fails cause teflon a shit.