[Blasterlord2]

embedded software is not old skill.

Programming satellite, avionics system, space crafts, driverless cars or  robotic systems or Boston Dynamics' dog-like robots require embedded software skills.
These are modern and future systems for mankind


It is more difficult than application/system programming.

Yes, it is not old skill but neither is it a more difficult skill. It is seen as more difficult only because it involves knowledge of hardware, and hardware is something that people need to spend money on, but for software engineering, anybody can pick it up without spending much, thus there is a bigger pool of software engineers. With a bigger pool you have a better community support. But no, embedded engineering is not more difficult.