Perhaps the solution is some form of interoperability across processors. Where they primarily run one ISA but have a dynamic converter that can based on some flag interpret memory as code from a different ISA? As chip fabbers and ISAs compete eventually a clear winner emerges and these compatibility layers are mere curiosities just like 16-bit mode on modern x86 CPUs.
Except wait, maybe this is just my cynicism talking, but I have a feeling intel has the resources to just plough forward with x86 and prevent any competition from gaining a foothold in the markets where they hold dominance (laptop, desktop, server). ARM continues to dominate mobile and perhaps some small portion of servers. POWER and SPARC stay in their little niches. Perhaps RISC-V makes its way into a couple of embedded appliances. And that's it, for the foreseeable future.
Except wait, maybe this is just my cynicism talking, but I have a feeling intel has the resources to just plough forward with x86 and prevent any competition from gaining a foothold in the markets where they hold dominance (laptop, desktop, server). ARM continues to dominate mobile and perhaps some small portion of servers. POWER and SPARC stay in their little niches. Perhaps RISC-V makes its way into a couple of embedded appliances. And that's it, for the foreseeable future.