Youuuuu stuuuupiiiiid faaaaake boooooomer they were standard on bikes in the 80s and you'd know if that if you were really a boomer and not a dumb zoomer. You'd also know that they only failed to remain standard because Shimano's marketing was disastrous.>>1222469
Yeah, BP is crap for large chainrings but it was really nice for small ones. The shape meant that during the power part of the stroke, you'd effectively be in a lower gear. It's nice for mashing (which at the time was the pro af style with everyone mashing along in uselessly large gears), and saves the knees a bit of stress, but it fucking sucks for spinning as it makes the motion feel jerky. It became sort of common for touring jerks to put a BP 26 on their triples, with round 36 and 46 chainrings.
The Osymetric and Q rings that some pros now use are oriented so that when you're in the power portion of your stroke, you're effectively in a higher gear, which some think is useful because it's making use of power that they'd otherwise be wasting, or something. You can rotate a BP 90 degrees to get the same effect. Which is likely useless.