Congrats on an impressive achievement and milestone. This is a great outcome, great work, and an indication of how far the hardware industry/tooling has come.
This feels though a little to me like building a simple SaaS service, and deploying it on a managed cloud service, and concluding all software is really easy!
This project is near to (if not at) the easy end of the hardware product difficulty/complexity spectrum. Some great choices were made to keep it simple and therefor easy.
An alternate take-away: "If you keep things simple, hardware doesn't have to be as hard"