You don’t need the last word in every thread. People who need that rarely get the first say in anything important.

The urge to reply once more is about winning a small exchange in front of an audience, and it costs more than it looks. Watching someone need the final sentence teaches everyone that their judgment can be bought with any minor provocation. The people who get consulted early on the things that matter are the ones who are hard to bait.

Leave the next one unanswered and notice that nothing collapses. If the point genuinely matters, make it once and let it stand by itself. Silence reads as confidence far more often than it reads as defeat.