Sure this isn't just nostalgia / rose-tinted glasses speaking? In the 2010s, Apple shipped MacBooks with GPUs that fried themselves to death, and iPhones that bent in your pocket and lost cell signal if you held them wrong. Today's Apple does have some software quality issues, but their hardware is the best it's ever been.
Could be nostalgia for sure, but the issues you are describing were not anticipated or immediately obvious on initial launch (at least as far as I recall).
From what I have seen of folding screens today, they come with some significant trade offs (creases, wear, etc). Over time, I expect these to be solved, but I don't think folding screens are a luxury item today as much as they are a tech novelty. But, the cell phone market has kind of stagnated in terms of hardware, and it looks like folding screens might be the thing to drive some upgrade purchases. During the peak iphone growth phase I believe Apple would have labelled these screens as not ready yet, but today I think they risk losing market share and are potentially somewhat forced to build a folding iphone.