My fold4 lasted 3 years, and still works. I'll concede it was only able to unfold to about 85% open at the end when I decided to upgrade. I was happy to upgrade to the fold 7 which has a redesigned hinge and better dust protection. I acknowledged the risk of mechanical failure as a possibility compared to a slab phone and after using it for years I decided I was still very impressed with the flexibility of having a tablet in my pocket. The fact that my 7th generation is significantly thinner and has a 200MP camera compared to the 4th is what sealed the deal.

It's not perfect for everyone, but I wouldn't go back to using a slab, there's too much functionality I'd be pissed giving up.

Granted, I tend to upgrade my phone every 2 years or so anyway.

Not the same guy. But I've been using foldables since 2019 as my primary phone. Samsung fold 1 -> 3 -> 5. No case, no protectors, keys with phone in same pocket. Never had an issue.