I'm gonna stick my neck out here and say these guys are choosing the worst and most convoluted way to develop software, much less, a lisp system to for the Apple IIe ever. And then, trying to make a sensation out of it.

I was alive and programming back when the Apple IIe was popular. While I mostly wrote code for the Commodore 64 and Atari systems of the time, I did write a bit of code for the Apple II and IIe.

Those computers are primitive by today's standards, but nobody was entering hex codes. That ended with computers like the ELF II. A lot of the machine code programming was done with a program called a 'monitor' program that was much like the DOS debug program that allowed viewing and writing memory as well as a single line assembly (i.e. inline assembly) that would allow writing programs a line a time in assembly.

But most of the programming was being done using assembler's and compiler's like the Aztec/Manx C compiler that is still availble today (google it) so what they are doing and saying is BS.