Hi Max, not sure if increasing speed would matter much. 8051 was a very popular microcontroller even before few years back, but those application did not demand such high speed. The CAST core would be useful for replacing the obsolete 8051 controller chips with FPGA. The designer would need to be careful for not to increase the speed beyond certain frequency in order to avoid timing violations if the FPGA and the core is used on an old design replacing the obsolete 8051 chip. It is good that the 8051 core has a high speed, but not sure if people will buy that for increased speed.