Cool to see that the same open source dynamics that make it possible for three engineers to ship a great web app in 3 months (Linux, Node, React, etc) also have

Cool to see that the same open source dynamics that make it possible for three engineers to ship a great web app in 3 months (Linux, Node, React, etc) also have made it much easier for people like your brother to use off the shelf tooling like Arduino to solve their own problems.