Just read an NDE on Reddit about a person who realized that not only have they lived a thousand lives, but that it was actually a very small number of lives to have lived.
https://www.reddit.com/r/NDE/comments/piptfk/i_completely_left_my_body_and_felt_thousands_of/
Reincarnation makes sense to me, because if you only live one life, the probability that you are alive at any given moment is extremely low. That said, if a thousand is a low number of lives to have lived, it must include non-human lives, simultaneous lives, or other timeline lives, because modern humans haven’t been around that long. This NDE does hint at simultaneous lives, since they said they realized one of their best friends was also their abusive father.