I think at this point in folding development we aren't really worried about the hinges or folding display tech itself, it's the soft scratchable films and risk of foreign objects or dirt getting under the screen at the hinge that are the actual thing to watch out for, so if you treat it carefully and keep it clean it will last just fine.
The only real annoyance I have with them is the screen protectors still peel off very fast right at the folding point and need to be replaced fairly often, the genuine ones last longer than the DIY aftermarket replacements, but I just wish it weren't necessary and the screen could stand up to a fingernail scrape. That said, i've had my Fold3 since launch and I'm on my 4th screen protector, which is a pretty good run all things considered, and I use the inner screen multiple times a day.
