Action timer in combat.

Also, I came up with another argument – the rules. Currently, a player can theoretically enter a battle with an opponent and simply go to sleep, for example. Or talk on the phone. Or deal with various kitchen/bathroom issues. There are many options. And in fact, it is virtually impossible to punish him for this. Unless he disappears for a long time and doesn't respond, then you can, at your own risk, close the game and contact the judge, hoping for a review of the factual violation of "fair play." But what if the opponent writes: "I'm thinking"? and keeps thinking for 40 minutes. And then another 40. What leverage do you have to influence him? With this option, such a problem would not arise. Of course, particularly stubborn players might take every second with each unit in a simple situation, but I think it's easy to deal with them by taking screenshots and contacting the judge.