It’s interesting to see the two discussing a game from their match. This doesn’t always happen at this level because the players don’t want to give anything away. But in this case the match is a kind of training event.
Some interesting insights can be gained from a post mortem, both your own and those of other people. And today’s improvement tip is to watch future opponents indulge in post mortem analysis because you can learn a lot about them. In the days when I played in round robin tournaments this was particularly useful.