As someone who (sometimes to the horror of his colleagues) regularly breaks out Ghidra to reverse engineer binaries, I blame it on RedEdit for having introduced me to the fine art of picking apart early Mac applications and figuring out out how they worked in such an elegant, genius way.
I loved it dearly, and dimly remember later editions of Think C and Think Pascal having checkboxes to obfuscate some resources, but by and large you could do a lot with ResEdit and a 68K disassembler…