Comment by xp84

I'm not calling you a liar or anything, I get that yeah, no apps really survive today that are laid out statically for each resolution.

I'm just saying that they don't release a new version of Uber, Instagram, etc. without checking to see what that flexible and responsive layout looks like on the most popular devices and, where important UI ends up suboptimal on one of them, it'll be tweaked before release. And I'm saying that nobody really wants more of these 'significant formfactors' to check.