I've made a deliberate choice against a quoting feature because it inevitably adds toxicity to people's behaviours. You are tempted to quote when you should be replying, and so you speak at your audience instead of with the person you are talking to. It becomes performative. Even when doing it for "good" like ridiculing awful comments, you are giving awful comments more eyeballs that way. No quote toots. Thank's
@Gargron provides context on the design choice. A counter point is overlapping audiences who may be interested in the topic, and where the quote is tangential to the original toot