While it’s true that there aren’t many really bad bikes these days, mountain bike engineers and designers are human, and as such, mistakes get made. The wrong codes get entered for shock tunes, and products often change from the pre-production samples that brand managers base their decisions on, so by the time they reach the shop floor, performance may not be as good as expected.
Take something as simple as numbers being transposed on a CAD file – a sensible 76° seat tube