Thicker pans are worth the weight

Yes. Thicker cast iron generally builds and holds seasoning better, and develops a more even patina over time.

It comes down to heat behavior, not the iron itself. Seasoning is polymerized oil, and it needs stable, even heat to form correctly. A thick pan has more thermal mass: it heats up slower but holds temperature more steadily. That means fewer hot spots that can burn off seasoning or cause it to flake. Thinner pans heat fast but cool fast too, and they’re more prone to uneven heating, which makes seasoning patchy and harder to maintain.

Patina—the dark, non-stick layer that builds with use—develops more consistently on thick pans because the temperature fluctuations are gentler. You’re less likely to get those weird bald spots where seasoning just won’t stick.

Thin pans aren’t useless. If you’re careful with heat control and don’t mind a little extra maintenance, they work fine. But if you want a set-it-and-forget-it workhorse, spend the money on a thick one.

Your shoulders will get stronger too.