Intel basically made s strategic mistake. They banked heavily on the PC mkt without realizing or for seeing the shift to small mobile processors.
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Fortunately for arm, Intel became too focused on protecting their desktop mkt to see that there is a brand new world out there.
I agree that they made a strategic mistake, but I'm not sure it was for lack of realizing the shift to small mobile processors. They knew it was happening, they just could not figure out a way in that market to make the fat margins that their investors expect. Investors would have pounded them for saying "we're going to this much less lucrative business because it's the future." And as far as I can tell, it _is_ much less lucrative, for all the reasons you have described in other posts. The vendors of ARM parts do not have the differentiation that would command high margins.
Andy Grove had written about a somewhat similar situation in the past, when they were getting crushed in the memory business (previous bread and butter) and made a strategic pivot to processors being their main thing. But even that was an easier transition than this because they were going up market, not down.
The current situation is maybe more like what happened to SGI with graphics cards or the minicomputer companies with PCs. They ran upmarket, but the slice that could command margins got smaller and smaller. This is the "disruptive technology" that Clayton Christensen has made a career talking about (
https://en.wikipedia.org/wiki/The_Innovator%27s_Dilemma). I'm not sure there's really a way out for companies caught in this situation, except to make strategic investments in the upstarts and to cash cow their business as long as they can and hope to figure something out before it dries up.
Now they're talking all about IoT, which is kind of interesting, but I don't see how SoCs for IoT won't be a race straight to the commodity bottom.
Note: not everyone believes in the disruptive innovation concept. Here's an interesting critique:
http://www.newyorker.com/magazine/2014/06/23/the-disruption-machineIt is ironic in that they practically invented the mcu mkt and 8051 is still today the most widely used mcu.
They also had a lot of opportunities to make something of the MCU market. 196/296, i960, etc. Some of those were fine parts for their day. Intel just had this funny habit of canning embedded processor lines, pissing off their customers immeasurably.
When I was there I worked for awhile on embedded controllers that mostly went into hard drives. The strategy of the entire division was 1) find some productive use for old fabs, 2) make things nobody else is doing well that are necessary to ship computers (computer needs an HD, HD needs a processor, so let's make that). USB came out of that division, too. That's a fine strategy, but it's a little weird, too, in they did not see a meaningful business for embedded stuff in its own right. It was all through the x86 lens. And in fairness, it made them a sh!t-ton money. Definitely catching up to them now, though.