Still too large for microcontroller applications. Most microcontrollers don’t even need an operating system, due to the small amount of RAM and ROM available on the IC, like the Atmel AVR uC’s on Arduinos, the PIC uC’s from Microchip, down to all of the old 8031/8051 and 6805/6811 variants.
The compilers and IDE’s used native assembly for programs, and later C for PIC’s and Arduinos.
All true but they’re probably looking to change the paradigm. Maybe (just speculating) people will write simple python apps for IoT applications. I don’t think you could do this sans an OS. What you say is true historically but it doesn’t mean it has to be true in the future.