Pieces of code interact more heavily than a linux machine. Testing requires more hand-holding/baby-sitting. Cross-platform architectures don't scale down well. There are many types of comms busses with no/few standard embeddings.
Some teams know how to make it a lot easier. Some CTOs know this, but most find out the hard way. Embedded practices lag webdev by 5-10 or more years bc they were good enough for a long time or for small projects. Expectations are rising, but there is less leverage than adtech so salaries are ok but not explosive.
