Oh my but this "Tactical" stuff has gotten out of hand.
Eventually it will be another buzzword for the antis to use when describing firearms with certain features just like the "assault" label on ARs and such now. The word is being applied to describe all manner of firearms, accessories and gear implying such frivolity makes "tactical" use easier. Yea, in some cases I guess but "tactical" is a rather relative term.
As far as a folding or telescoping stock on a crossbow sure why not. The crossbows I have handled were heavy and cumbersome. Hard to carry and use. Anything that could possibly abate that issue I suppose would be a good thing.