Processor instruction sets won't be interesting until they have security built in. The main support must be support for structured memory with bounds checking. Building such facilities into hardware is the fastest way to do it. Without this, personal devices can never be secure.
The claim here is that RISC-V will support AI. But AI is being used more and more against the individual. Security protects the individual.
Computing is moving in the wrong direction – support for anti-individual AI while ignoring and denying individual security.