[bcrl]

Looks very similar to what Transmeta did. Hard to know if there are any real gains without hands on the actual hardware. 4 instructions per clock as 2.8GHz is not exactly earth shattering performance by modern standards.

[zsmi]

The architecture looks fairly different than Transmeta's architecture to me although the purported multiple ISA user feature is similar.

They presented some high level stuff at ISC 2020. https://www.tachyum.com/assets/img/Tachyum_20ISC20.pdf

The image on slide 7 looks almost exactly like this design (including the 8x8 core matrix)

https://en.wikipedia.org/wiki/TILE64

Which targeted the same market. The problem is, this is actually a pretty hard architecture to program for.