In Europe, chess matches were played without time control. It happened that a player with a clearly losing position would try to wear down their opponent. Sometimes this worked. Matches would last for many hours, even days. The "last straw" that overflowed the cup of patience was the first international tournament in 1851, when an assistant referee, recording the moves in the Williams - MacLeod match, made the historic note: "The game remained unfinished because both opponents fell asleep..."

Sorry, Valer, that's not relevant. In SoD, you can easily drag out a match even in just one minute – I won't even explain how. In TE/VT, it's more difficult to control the time in battle (although I have a hard time imagining how, and I'm strongly against it). If you want to not finish a started match, there are many ways to do so. In general, I think playing online with another person implies mutual respect and trust, which also extends to the fact that the opponent will not intentionally drag out the match, and if, for some reason, someone needs to leave for a short time, it should not lead to a loss in the match (as, sorry, it often happens with you). Here's an example: let's say during a match, I need to leave for, say, 5, maximum 10 minutes, several times. It's inconvenient to agree with the opponent every time, and with a 6-minute limit, I simply make a move, I have about 4 minutes left – I don't pass the turn, I leave (just because if I pass, there's a risk that the opponent will make 1-2 moves and I'll come back at the end of my turn). Thus, some time is lost. In unlimited time, I immediately pass the turn and leave, and in 95% of cases, when I return, the opponent is still making their move. So, unlimited time definitely rules if both players are honest (I consider myself to be one, and I don't play with others).