Time is money, or are you going to waste it?

It's difficult for me to play with a small time control because many things don't happen automatically (compared to streams, for example), but I have to think and remember, and if 6 minutes is enough for a standard match, then I won't be able to do anything in 4 minutes (I haven't played with a chess timer, but I think it will be the same in battle).

Well, for this, you can simply practice with bots. After some training, many routine things start to be done automatically. In addition, I believe it is wrong to "do your own things" during the opponent's turn, because in this way you waste not only your own time but also the opponent's time thinking about various things during your turn. I fully support the idea of chess clocks. Whether to allow the clock to tick during battle is a complex question. I am in favor of allowing it. If you really need a break to eat, smoke, drink coffee, or relax, nothing prevents you from agreeing on it with your opponent. When playing with chess clocks, it would be good to add a function for such a pause (naturally, by mutual agreement) - the timer for both players does not tick, and the interface for both is as if during the opponent's turn - you can look at anything, but you cannot do anything. This function will be useful to refresh the map in your memory, which you saved last weekend.