Are you confusing "embedded" for "microcontrollers without an operating system"? There are plenty of embedded CPUs that can run Linux. Buildroot even exists to

Are you confusing "embedded" for "microcontrollers without an operating system"? There are plenty of embedded CPUs that can run Linux. Buildroot even exists to make it easier to create distributions for these types of devices. For example, I would consider the reMarkable 2 to be an embedded device, but it runs full-blown Linux (to the point of having a bloated Qt stack). That's probably an extreme case though, as nobody in their right mind would actually try to run Qt on an embedded device with any reasonable limit on resources. I'm sure rM only does it because they can afford to be wasteful - they have hundreds of megabytes of space for the operating system, and all the latency-sensitive stuff is definitely not built on Qt. Reason I know this is because they offer SSH access to the device and an SDK.