I may be misremembering, but I’m pretty sure the monochrome icons began well before Ive had influence on the software. OS X moved towards shape rather than colo

I may be misremembering, but I’m pretty sure the monochrome icons began well before Ive had influence on the software. OS X moved towards shape rather than color in eg iconography to support UI scaling (which had been an effort, and a more ambitious one, for years prior); and then eventually to support adaptive theming most recognizable (for its value anyway) in dark mode.