I've been seeing a lot of stuff like this over the last few months. (Mostly because I've been looking for it.) The tagged memory possibilities in RISC-V and aarch64 v8.5+ architectures, combined with the natural suitability for vectorization that lisp programs seem to have make the Lisp machine a natural fit, and IMHO something that will come to us sooner than later. I'm very excited to see these and work on them, and intend to throw my own hat into the ring on it, sooner rather than later.

Maybe I'll start a blog. Anyway, godspeed lisp hackers!