Thanks Paul, that's very interesting to see the different approaches as to what is accepotable in relation to winning reactions and game etiquette in general.
I've just been watching the last 10 minutes of Chess.24's live (at the time) feed of game 14 (beginning 4;18;30 - see below) and GM Naroditsky's suggested move for Ding after Gukesh played Ke5, was "okay, so rook f2, rook b1 check....." and GM Leko didn't disagree, and it was only when the eval. bar dropped to zero that they both saw it, so clearly Ding wasn't the only GM who missed it.
I think I'm just a bit peeved at all the online Monday morning quarterbacks that seem to be opining on this at the moment.
https://youtu.be/rqA9mvyI0j4?t=15501