Yea, I think it's implied that hard-cider exists in MLP-FIM but sense they never actually call it that any given glass could just be regular old apple cider... or the CMC could have been under controlled exposure and just developed an immunity to alcohol ???
Hey so Sweetie is attracted to cyder? Will keep in mind next i go around the outskirts of Equestria (plan: box + stick + string + cyder cup filled inside the box visible to anyone passing by...perfect trap!!!) (if i get Berrie at first attempt i can still sell her well in the black brony market...)
I don't have the episode on hand to check, but doesn't that cider look like the crappy stuff Flim & Flam wound up making after they went from apple cider to tree cider? (Unrelated to Berry Punch's existential dilemma)
Not if it's soft apple cider (which is mainly a drink in the U.S. and Canada, so I don't know how familiar you are with it). It isn't cider in the typical sense, but most people (in the U.S., at least) still call non-alcoholic root beer "root beer" despite it not being beer. And we call guinea pigs "guinea pigs" despite them being very distinctly not porcine. Apple juice and soft apple cider are different drinks.
It's rare, but you do still sometimes find alcoholic root beer. But just like how Coca-Cola is no longer a coca wine prescribed to help morphine addicts, root beer lost it's history during prohibition. Guinea pigs though? That's an odd one. I don't know why people didn't just use the native South American name for them, "Cuy," but supposedly it's because they're built like pigs and can survive in enclosed environments for a very long time. Though another theory is that the name stuck because they're used in medical research similar to how pigs are used.