Why are we still stuck with this ridiculously small character limit?
Popular threads run at a mile a minute sometimes.
If you're offline for even a few hours, you may already have several posts you want to reply to.
It's considered bad netiquette to spam a thread with several different posts in a row without intervening posts from others. So trying to reply to each post separately is a bad idea, that's why we have multiquote in the first place.
But ... if you try and reply meaningfully to multiple posts with multiquote, you inevitably get told "YOUR POST IS TOO LONG. PLEASE SHORTEN IT." and have to Ctrl-X, post, and edit it afterwards. Doesn't that make the limit a misfeature?