This is one of the best posts I've seen on this topic in a while.

I finished a math PhD before I decided to get out of academia and into startups. Since then, the older I get the more of a Platonist I become, especially now that I've taught my daughters a bunch of math (I'm their homeschool math+science teacher). And the more of a Platonist I become, the less I care about who made a particular discovery. Who cares?! It seems obvious (and quite beautiful) to me now that the same discoveries must be getting repeated again and again across the universe by alien mathematicians, and eventually by their AIs.