I would answer them Raspberry Pi is the only standardized-config, also fairly widespread and reasonably affordable computer. Standardized config is a must for a

I would answer them Raspberry Pi is the only standardized-config, also fairly widespread and reasonably affordable computer. Standardized config is a must for a custom OS (so it is reasonably easy to fully support the hardware), price is among things which killed Be, vibrant community of geeky enthusiasts of all levels is a great bonus. RISC-V doesn't have any of these, it hardly even exists.