The entire point of using bare-metal MCUs is to achieve efficient, deterministic performance with tight control over timing. All that goes out of the window if

The entire point of using bare-metal MCUs is to achieve efficient, deterministic performance with tight control over timing. All that goes out of the window if you're using a software stack that uses 30 instructions to toggle a digital output pin. If you're going to use something that's basically a late-90s desktop and develop on the basis that you can afford to burn cycles, you might as well use a proper RTOS and enjoy all the affordances that come with it.