Hi,
I'd love to know that even elevators run free software, though.
They do, to a point. Of course it varies, but I recently spoke to a company refurbishing old elevators. Their control software was built on Wind River Linux. Admittedly, there's a lot still to do until the entire stack is free software, but free software is getting into almost any industry.
What's important now though is to not let this slow us down: there's a lot still to do and we need to move the goalpost all the time to challenge everyone to release more and larger parts of their stacks as free software.