Problems:
1: Clicking the "quote selected text" link causes it to register that post itself for "quick reply quote." We have the "quote message in reply" box checked by default, so the end result is the entire post is quoted as well.
2: It can only quote one post at a time, rendering it rather useless...
I'd use it if the following improvements were made (especially if they were added as options in the admin CP!):
1: Doesn't actually mark the quoted post as "being replied to," thus leaving the normal quick reply button for that task.
2: Allowing quoting of multiple posts.
3: Don't have it automatically take you to the quick reply box when you hit the "quote selected text" link (this may be a side effect of #1 though).
Right now, this:
https://vborg.vbsupport.ru/showthread.php?t=149441
is MUCH more what I'm looking for (especially with the posted modification to tie the quoting selected text to the QR button), but the only thing holding me back from it is that the QR button no longer works normally.
Back in 3.0, there was a hack like this that, if there was selected text, pressing the QR button quoted it. If none was selected, it functioned like normal (flagging the message as "being replied to.")