I'm sort of curious what the "long-lived embeddable CPU" of this era will be. I can go to Mouser right now and buy a pin-compatible 80186 right now in quantity

I'm sort of curious what the "long-lived embeddable CPU" of this era will be. I can go to Mouser right now and buy a pin-compatible 80186 right now in quantity of 1. You can even order a new 8088 from Renesas, but it says they're back-ordered til next February. I've seen 386s and 486s manufactured recently enough to have the "newer" Intel logo (the one without the dropped "e") which implies well into the 21st century. With modern product lines, I'm not so sure. The Atom-class products that seem most appealing for embedded use tend to have a very short shelf life (in those terms). I wonder if they're saddled by a dual market obligation-- I suspect Intel wants to sell to both "quantities of 100" embedded markets, and "quantities of 100,000" $199 laptops/tablets, but they're really only viable use of production capacity as long as the quantities-of-100,000 orders last. I'm not sure the ARM ecosystem is better, because of the tendency to highly-integrated SoCs. Even if some manufacturer says "here's a vault with 50 years worth of chips", it's unlikely they'll have the one particular part you want in that vault.. I wonder if, of all things, it would end up being something like the RP2040/RPi Pico. Third party designs are going to leave a lot of inertia to keep it available as-is, and at the same time, there's not really a single market-dominating customer who makes the product uneconomical if he leaves.