Most of the toolchain got hidden behind openvino and there was no hardware released for years. Keembay was 'next year' for years. I have some code for DSP using it that I can't use anymore. Has Intel actually released new shave cores, with an actual dev environment ? I'm curious.
The politics behind the software issues are complex. At least from the public presentation the new SHAVE cores are not much changed besides bigger vector units. I don't know what it would take to make a lower level SDK available again but it sure seems like it would be useful.