Yeah, that concerns me.

My left pocket loadout is a small carbon fiber clip, with cards and cash, and my phone. Been that way for five years and I have no intention of ever changing it.

I'm skipping this year, mostly because I want the Max camera and the regular form factor, but also to get some field data on whether this newfangled mag connector scrambles cards.

On the one hand, they're prominently featuring an accessory which clips your cards to the magnet itself. On the other hand, they build that accessory, and they don't build my clip, which offers no magnetic flux protection whatsoever.

My guess is that they will say "no", but in reality, probably yes. My AirPods Pro case will demagnetize hotel keys fairly easily, especially ones that have been rewritten to multiple times.

I had a card case for my iphone and my cards would routinely get corrupted. I couldn't figure out why it was happening, there wasn't a magnet in my iPhone 4s at the time.

I eventually figured out that it was happening because I'd been routinely laying my phone on my iPad, and the magnets in the iPad would, over time, murder my cards.

The new phones will absolutely corrupt your cards, I don't care what Apple marketing says.

Buried in the marketing content of their web pages somewhere, which I'm too lazy to go look for again, is the answer: "no".