$3.7mm/15 years is shy of $250k/yr TC. There's something to be said for being able to work on your life's passion, but not all of us can think up funny amazing dawrf simulators, and even if we did, there's already a really really good one. https://xkcd.com/2347/ applies. Unless people start being a whole lot richer and a lot more generous, newer load bearing pieces as appropriate for our newer world aren't coming about. Instead they're Facebook and Google supported.