I started with cast iron before getting a nice stainless pan, and I had every intention of using both equally, but I rarely reach for the cast iron now. Really only use it when I need very high heat (like for cast iron pizza) or with things that would stick a ton and make a mess (like burgers)
An unexpected one for me was my air fryer. I thought it would be very situational and gimmicky, but I use it all the time. It’s basically a small second oven that cooks food faster, uses less energy, and doesn’t take forever to preheat