One could also argue that it doesnt make sense to use super aga when there's a plethora of faster options available for less money too. Simple fact is ocs/ecs/aga have been around for a long time and there's a lot of software for them that people want to use (as do some rtg standards). I understand the want for super aga, and I find it potentially interesting as well, but ocs/ecs/aga/rtg are more useful for now.
SuperAGA is backwards compatible, and writing RTG drivers for it would be feasible too. The point is that it makes no sense to build an expensive FPGA based accelerator and then hook it up to ancient hardware that will ensure it can't possibly give optimal performance, when you can fit the rest of the Natami (or FPGA Arcade/ Replay) cores on the same FPGA for little extra cost and end up with a far faster and more capable system that's still backwards compatible.
You sacrifice 100% compatibility the moment you ditch a cycle exact 68000 anyway.
