I am returning to WoW; my last serious game time was back in 2006. Since then, the whole game has changed so much it is really confusing for an old guy like me.
Do I need to buy all the expansions (e.g. Mists of Panderia, Shadowlands, etc.) to play that content (I currently only have the base game)? What if I join a party and I don’t have those expansions and my party wants to go to those areas?