Uberi/ahkbook — comment on commit 4525eb8a6067fc176ef5ece577811dcd419b84c9
File: en/_posts/2011-11-12-Structures.markdown line 46
By Uberi:

AHK Classic would not be able to use 64-bit addresses anyways, I think it's kind of a given that 64-bit compatibility is not possible in many situations.

It would probably be more relevant in the AHK Classic vs. AHK_L page, since this is not specific to structures.