This is literally the very last official RWBY animation provided directly by the now-permaneantly-closed Rooster Teeth company. RIP, RWBY series. May some other future studio pick up on volume 10 and hopefully finish out the series within a few seasons left (not that RWBY ever improved over time, just became slightly unrecognizable.)
They had Port explain in the animatic from what was supposed to be volume 9's finale that Salem went to Vale and destroyed it after the events of volume 8. Remember the gang was gone for at least a few weeks.
Maybe it’s just me but boba and traditional tea I don’t see as the same at ALL. Like no one associates them as the same. Plus this is clearly a family memory for them so what is the issue you are bringing up?