Firstly: FASMG Appears Impressive and Powerful.

If I understand correctly, the Compiled-Assembly-Like-Macros for x64 that are currently included to provide FASM2 (using FASMG) are themselves interpreted during builds of source code compiled (assembled) by FASM2.

I propose/question that an advancement would be to save the Compiled-Assembly-Like-Macros to a persistent file (analogous to pre-compilation of C). Granted, some Compiled-Assembly-Like-Macros may not be candidates for pre-compilation, e.g. those that require variable data such as offsets.