Unless you unfold it (duh), the 9 fold has a smaller screen than the 9 pro.

Fwiw, I’ve had folding phones for a few years now and never had one break or begin to feel worn, but I’m sure millage will vary a lot depending on use.

Personally I love having the option to quickly get some more screen real estate. Perfect for spreadsheets, presentations, and video. Running things like remote desktop is also nicer. Having two apps side-by-side definitely has its’ uses, e.g. I can look at that screenshot/thing someone sent me on slack while I’m typing up my reply (or browse Lemmy while “following” a dull work all hands).

I bought my first folding phone on a bit of a whim, pretty just because I wanted to check it out, but now I think I’d miss it a lot if I didn’t have one.