I am one of these people but I do not keep quiet about it nor do I scream it from the hilltops, except on Medium. I have discovered that this is my 17,043rd human incarnation. So far I have only been gifted knowledge of a handful of these other lives. Knowledge but not memories. I have written a several essays on the topic. Here are a couple of them. https://medium.com/know-thyself-heal-thyself/why-the-concept-of-reincarnation-can-matter-to-this-life-of-yours-d44bada6fc92 and https://medium.com/living-out-loud/why-should-i-come-back-625b199f083c