Not a myth, but my hill to die on...cast iron skillets are overrated. This is a me problem. I consider myself an above average amateur chef, but I absolutely hate dealing with my cast iron.
I now go with stainless steel. I get it hot enough so water beads up, oil it, and then it essentially acts like a non-stick at that point.
I say to each their own on cast iron vs stainless steel but i just hope for all sorts of reasons people move away from teflon/non stick pans.
It's 100% a case where technology went backwards in 70s, 80s, 90s and early 00s and now people are realizing we had the ultimate tech all along.
You can use these pans for centuries and they cook better too in a more natural way. There's a little bit of expertise needed with both but it's worth it for the benefits and that they last forever.
I use both equally and if I'm just searing or toasting something I go cast iron and if I'm cooking something that's going to eventually become a sauce I use stainless steel.