I always find it funny when people do that with Windows, Mac, and Linux. It completely misses the fact that Linux can be all of these things.
OS for kids: https://www.sugarlabs.org/
Just works: https://www.linuxmint.com/
Fuck around and find out: https://www.linuxfromscratch.org/
the big dog in the vehicle space is more likely QNX, which is still up to date.