If my calculations are correct (and they're probably not but I'm going to pretend they are anyway), Spec's Gensou no Satellite marks 1500 Ranked osu!catch difficulties.
When I started recording these statistics in late 2015 there were a little over 400. That leaves us with roughly 1100 difficulties reaching Ranked in the years of 2016-present, and around 500 of those (almost half!) occurring since the start of this year.