I mostly stuck to a small circle of communities on Reddit, and while the quality of content has stayed about the same, the frequency of posts has dropped notably in most of them.
The one exception is /r/iiiiiiitttttttttttt/, which is supposed to be for IT memes and funny interactions with users. Since the blackout started, that sub has gradually devolved into reposts of years old memes (not even IT specific memes, just anything tech related) and text posts asking random computer questions, which was previously banned.