@kalethequick I don't know the details, but I think it would be possible to add support for VoiceAttack. I believe the necessary interface could be written in LUA. I just don't think it's worth the effort.
I don't think voice command is the future for RTS. You can get a lot more precision with mouse and keyboard. There are only a few things I can think of where voice could be more useful than trying to do something with mouse/keyboard, mostly things that would involve trying to select a lot of different units/buildings that are spread out. Even if you can set up keybinds for that, it's not easy to remember 100 keybinds, but it should be easy to remember 100 voice commands when they all follow a pattern, e.g. "Select all land factories" vs. "Select all air factories" rather than trying to remember "select all land facs, I bound that as ctrl-shift-L, and select all air factories is ctrl-shift-p" and then you press ctrl-k by mistake
An RTS that primarily functioned through voice commands would have to have a relatively low level of complexity, so I don't think it would be fun, and if it's that simple, keyboard + mouse would probably just be faster and better for most aspects of it anyway.