As for why I didn't choose to preserve my memory at that time, there are two possibilities. One is that these options were random, and maybe [Memory Preservation] wasn't available then. The other possibility is that there were too few points, and after a difficult decision, Wang Tao didn't choose memory.
Given Wang Tao's understanding of himself, he thinks the latter is more likely.
The ability to retain memory after time travel is indeed impressive. But the premise is that you are confident you can live a better life on a redo.
Wang Tao estimates that the situation at that time must have been bad, and even if he retained his memory, he wouldn't have been confident. So it'd be better to choose a powerful hack. At least survival ability is pretty strong, and there's still a chance to continue using [Time Travel], and remember to preserve memory on the very last use!