Usable icons _are_ a bit interesting. A bunch of same shapes with same-ish colors on a grid is NOT prioritizing usablity. It's prioritizing minimalism. The middle icons in that list are interesting enough that your visual cortex can pattern-match to your previous experience selecting that app without much conscious effort. The oldest is a bit much but at least still recognizable (not necessarily "well known", that's different), but the new ones are worse: so boring and generic that it takes actual conscious effort to select them from a sea of sameness.