First, we can transparently emulate an reu from sd card. it will then behave just like the real thing.
As fir 99.99% we would of course love this and work in that general direction. however the c65 is not even 99% c64 compatible. probably not even 80%. Our first goal is c65 compatibility and as much c64 compatibility as possible. by in the end it requires a LOT of work to get each extra 9. You are welcome to help us achieve them, of course.