I think that has been discussed elsewhere in this forum. In short: permanent sketches are only supported for SD card images
cannot fully agree with you
Sketches are not embedded in official Intel BSP builds (like BSP 1.0.3 or BSP 1.0.4) for SPI memory.
It is possible to create own SPI image build with a preinstalled sketch.
well, sure - but that's not supported but up to your own, right?