Absolutely. I never played Vanilla, but I know how it works and how it differs from retail. Blizzard treats us today like rats in a skinner box with retail WoW. All content is designed with that in mind. It's gotten so fucking out of control. It's literally almost impossible to achieve a BiS character in retail today. You'd have better luck flipping a coin 100 times and trying to get it to land on heads every time.
Vanilla you could actually get BiS. Yes many people never even got there because BC was coming out and they said fuck Naxx, but still. They could have if they wanted to. I'm just excited to get back to being an fucking MMO. Retail has almost zero player interaction, despite it being forced at times. I have been told to stfu more than once when I try to talk to my fellow dungeonmates. It's a sad state of affairs, but 10 minutes into the 24hr stress test and I already had people talking to me asking if I wanted to group up to kill the mobs for a quest. Shit is gonna be legit boys and girls.
I guess you have to ask yourself if playing the game, and achieving all of those things, including downing raids and getting that sweet loot is worth the time investment? To me it sounds like it would be worth it, but your situation may be different. Hope you decide to play man!