What this article misses is that all that hardware is pretty much standardized. You need very small teams to design and test it. Manufacturing is mostly automated (or outsourced). This is still a niche job market compared to software, even if software is shedding and RF is adding.

As a Ham, RF engineering seems interesting, but there's really not much for job prospects. Glassdoor shows 125k Software Engineer jobs and 7k RF Engineer jobs in the US.