I mean, Blackberry was huge and the market was still rapidly growing with no signs of slowing down. The addressable market was even bigger since even back then lots of people didn’t have cell phones and the majority were still feature phones (but more and more people were ditching landlines instead).

Sure, it can be hard to know when to stay in, but the “death by a thousand cuts” is not a financial problem. These are often rounding errors to continue. It’s a question of focus. And Intel clearly made the mistake of thinking they didn’t need to focus on mobile.