I work at a company that does embedded development and our engineers are very age-diverse. The team I am on consists of people directly out of college, people with over 30 years of experience in the industry, and everywhere in between. The last few programmers that we hired were 55+, and they were able to breeze through our interview process and quickly become invaluable members to our team.

I think that older engineers definitely have an advantage when it comes to embedded and other low-level systems development. The Javascript framework that you worked on 5 years ago is now obsolete, but the experience you got writing kernel drivers 25 years ago is still very useful today.