@Gargron In my experience, RTs on Twitter were abused far more than quotes. I saw people RTing things all the time that were alarmist or reactionary. The single-tap retweet allows people to propagate stuff thoughtlessly, and my Twitter experience got a lot better after I turned them off.
Quotes tended to be more thoughtful—they forced people to think a bit before speaking and explain, “this is why it’s relevant”. That makes them HARDER to abuse, IMO. Would MUCH rather have quotes than retoots.