> I'm not going to claim that the CEO of pre-IPO company has no incentive to bolster the claims of his tech

I am going to say it. The CEO of a pre-IPO company has extreme incentive to bolster the tech he is selling, to the point where his every action should be viewed as only in service to that goal. Every word he says should be viewed critically through that lense. He is not making this post out of the goodness of his heart, he is doing it in service to the IPO. If it happens to align with your views that's great, but it's still just a marketing stunt to get people with your views to buy in. Don't be fooled. Buy in if you feel it's a good deal, not because of the CEO's marketing.