[efferifick]

Not sure how realistic it would be, but I would like to see a RISC-V base core, and the FPGA implementing the extensions. Why? Because it would be cool! Also, I don't really see a use case except for debugging compilers supporting multiple RISC-V extensions and what not.

[craigjb]

Microchip has the product for you then! Well, the RiscV part anyway. https://www.microsemi.com/product-directory/soc-fpgas/5498-p...