Nit: ARM was originally developed for desktops as well, but very price constrained ones, and the story as I remember reading was that they couldn't afford the c

Nit: ARM was originally developed for desktops as well, but very price constrained ones, and the story as I remember reading was that they couldn't afford the cost of a ceramic package. So they were very careful about power dissipation, and when the first silicon came back, they found it consumed 1/10 of their design goal. The low cost and low power made it a natural for lots of embedded designs following that.