Sure I'll take that bet, although I won't bet against other technology maybe not taking a slice like rollable screens or maybe AR will hit its stride by then. I've always said foldables are a stop gap in the road to shrinkable screens. Sure 48 million is a drop in the bucket compared to non foldable sales, but my intent wasn't to prove foldables are taking over, merely to outline that it's a HELL of a lot more than "dozens."
"Solution in search of a problem" I don't mean to call you out on that, but in general when I see that statement it just smacks of massive ignorance, maybe it's just me but I honestly just don't get how difficult it is to understand that having a larger screen compact to a smaller more portable package is the solution to having to carry around a large screen. The concept is so dirt simple, that's why it's baffling that some just can't fathom the 1st grade physics. Yep my 6-year old has no issues realizing that his iPad mini won't fit into my front pocket, yet here we are. Now if someone doesn't like foldables because of the crease, or concerns about durability (which are overblown anyway but still valid), or other inherent negatives I can totally see and understand the reasons why they would not choose a foldable. It's just this weird inane penchant for some to feel almost insulted that foldables exist that I can't understand.