Disbelieving a fellow customer because they haven't experienced the issue first-hand is one of the hallmarks of owning an Apple product. There is a long history of defects in Apple products that started out with the blame being put on the customer. It was only at the point of threat of a class-action lawsuit that the truth was revealed. THEN Apple (grudgingly) announced a "program" to address the issue (that most claimed wasn't an actual issue in the first place).
In this case, I don't think it is a defect in the design or the material used in these new iPad Pros.
The iPad Pros that are coming bowed out-of-the-box have the earmarks of the rush to manufacture that is somewhat typical at the beginning of a product's release. Often the machines on the manufacturing line need frequent calibration that might not be done when dealing with such high initial volumes. Just being 1/1000th out-of-spec that accumulates would result in a defect every 1000 units. This isn't to excuse the issue, but to offer a possible explanation.
This is why I typically wait 3-4 months after the release of a product before buying it (the except was the 1st gen iPad which I pre-ordered on the first day that orders were taken).
I think from its frail ness and lack of internal structure there is something going on design wise that is making these iPad Pros more prone to bending under absurdly light conditions.
That’s not to say every iPP 2018 will bend, the 11” I had and returned was straight and stayed straight the week and a half I had it...
But it never left my apartment either or being babied, relatively
If you wait 3-4 months every cycle you’re already like 1/4 to 1/3 of the way into the product life cycle in case of something like iPhone.. iPad with longer cycles might not matter, but then again might not matter at all since you seem to maintain that hard and fast rule and buy 3-4 months out every time, so makes product cycle moot.
For items that go on sale a few months out, like in the case of iPads, its probably a double win for someone like you who has better success down the road
I’m still not sure I believe this is the case, I think they pump out products period but I guess in theory if demand goes down, and orders are lowered, they arent as strapped for time to produce these things
I would think with economies of scale over time, and incorporating more supplies to drive costs down, it could be even more of a quality control gamble.. but I see the argument both ways.