Investors do not care about the product, the users, etc. They care about cash. There are lots of ways to make cash that don't involve having a good product. But if you commit to spending a trillion dollars on hardware, then borrow hundreds of billions in the short term, and it turns out there's no way to recoup the cost, the investors go looking for better returns. This would've worked back in the old days of a bull market, angels looking for the next whale (with "modest" $5BN investments), and startups with no rivals. But in a bear market with multiple competitors trading on a commodity? Lol. Finally the bubble bursts.