A lot of folks are missing the point.
RISC-V is *early* days. gcc just got basic support for the architecture a few years ago.
Don't see this as an attempt to make a disruptive product, it's not. What is *is* doing is getting the architecture out there in a big way.
* 20k enterprise router using this board? Hell yes.
* 20k enterprise storage array using this board? Hell yes.
* Open source developer want to play with something other than ARM + x86? Hell yes.
All of the things above help push the ecosystem further. More adopters, more patches to things like binutils, vim, bash, etc, etc.
* x86 has been in heavy development + usage for 40 years now. Of course clock speeds of RISC-V are "slower" at 1.5 Ghz.
* ARM is in every mobile phone. Of course it's cheaper!
However, RISC-V is a core which doesn't come with any IP licensing costs strapped to it. This explains why folks like Western Digital are backing them in a big way. Fast RV32/64 cores strapped to SSD's, HDD's, etc. No ARM licensing costs.
RISC-V is disruptive. It's just a disruptive in the "far down the road" way.