For a company that has it’s own in-house CAD/CAM facility and a CNC machine, if it’s a CAD model today it could be in the metal tomorrow :)
As someone who uses one of their I/O chainrings I’d be happy to buy a cassette adaptor from superstar.
The only thing that’s holding me back is that Shimano / SRAM must be kicking themselves that they don’t do a 11/40 cassette and if they did, which let’s face it, they’d be stupid not to, the entire cassette convertor market would be wiped out overnight. Also there’s no way I’d pay more for the big cog than for the rest of the entire cassette.