My reasoning is that RISC-V is supposed to be an open instruction set architecture that is intended to be replicable in hardware without some of the the associated costs of x86 or ARM.
I know we’ve seen this kind of thing before but supposedly there is interest from manufacturers. If there were ever enough interest to produce desktop class CPUs based on RISC-V, Haiku could have passed Beta 1 by then and gained more interest. If the two coincide, it might be possible to build Haiku workstations using RISC-V CPUs as a sort of “PC Lite” or modern-day BeBox.
There’s not necessarily anything wrong with x86 or ARM, but RISC-V claims to be “open” and presumably free of microcode blobs.