It's an interesting argument. From a software perspective it's like building in a standard interpreter (eg lua) and extending it with a library that talks to yo

It's an interesting argument. From a software perspective it's like building in a standard interpreter (eg lua) and extending it with a library that talks to your application. So you get the benefit of a standard interpreter (lua or RISC-V ISA) that you can use standard tooling on, plus the appropriate extension for your use-case.