Perhaps it might deliberately be used for inserting serial run-time commands into the parsed script to instruct it to do additional things not listed in the actual script. I know it's possible to 'chain' in new chunks from a file, but this might offer real-time serial commands on the fly if ever that was needed.
It might even offer a way of of having macro commands, whereby instead of needing to select from a list of pre-defined alternatives, eg:
if cmd = 1 then gosub [command1]
if cmd = 2 then gosub [command2]
if cmd = 99 then gosub [command99]
...perhaps a value could be inserted by macro, simplifying things to...
gosub [command & {turkey_quote} cmd ]
Obviously the 'turkey' quotes could be changed to something different and more suited as a 'macro' insertion character (^ or ~ or @ or # etc), and perhaps the macro input might be terminated by a matching macro end char, maybe resulting in something like...
gosub [command & ^99^ ]
It even ought to be a fairly simple matter to allow user-defined macro characters to be used if wished, ie: let macro = "^" to change it from any turkey default.
Just an intriguing thought.