The specific context mentioned was integrated entertainment systems in cars, and no, there are no "better suited RTOS alternatives" in common use there. It's Linux or QNX.
Your generic talking points about Linux in other fields are completely irrelevant for that.
Fair enough, then I would point out to the bare metal Qt deployments and Android as well (which the Linux kernel is an implementation detail for the Java and ISO C userspace).
Your generic talking points about Linux in other fields are completely irrelevant for that.