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.
Carbon steel FTW. I have a hand-hammered carbon steel wok (as well as one carbon steel knife). I live on a sailboat which means salt air. These two pieces of carbon steel perform so well that I’m willing to accept their higher maintenance “costs” (cost, in the effort context).