[yau8edq12i]

I'm not sure I follow. Why would I want to "use" an mcu board the same way I use my linux desktop? It's not like I'm going to dynamically mount an SD card from a CLI for such an embedded device. Or that I would want to have a CLI at all. It is designed for early prototyping?

[acassis]

You don't have to mount it dynamically if you don't want. You can use it in a very static way, like your baremetal way to do things. But you can also have option to do it dynamically, case you have different SDCards with different binaries to load (yes, NuttX support dynamic ELF loading as well).

[sitzkrieg]

Exactly. You can prototype heavily and make sure peripherals, firmware programming, etc is working/to your advantage before doing any pcb work

That said bigger mcu,mpu +fpga type devboards will still absolutely price out hobbyists