Twitter messed up by allowing locked accounts to quote tweet, thereby empowering harassment by making it impossible to find and block the source.
Mastodon takes the opposite extreme by preventing quoting entirely, which I must admit inhibits they way I often promote other people's tweets / articles / etc with a favorable quote-tweet.
Here's the long-standing explanation why: https://fedi.tips/how-to-use-mastodon-and-the-fediverse-basic-tips/#WhyCantIQuoteOtherPostsInMastodon


