Auto-translated
I myself used to think that you should play until the very end, just in case the opponent has something up their sleeve during a break, and might not be able to resist the urge to: "just take a quick peek, or maybe a slightly longer one...". But in my last game with Yegor Korobeynikov, I was convinced otherwise. I insisted on playing "until the very end" during the game. As a result, the game lost all interest, I didn't sleep at all, and went to work at 9. Conclusion: everything should be in moderation. Don't trust me? Fine. If you lose, you can check the saves. If something doesn't suit you, you can figure it out.
P.S. Some people play Dota for 48 hours straight...
If you install a mod to transfer troops, artifacts, and improve the interface, you can open the heroes in another window and auto-load them. So, playing "until the very end" is not a guarantee of fair play. There's simply no point in playing that way, even in a tournament without prizes.