Best episode of the decade. I've often wondered about how Homer and Marge would no longer be Baby Boomers any more and if they'd ever reference that fact, and sure enough they did it the funniest way possible. The Simpsons is truly better than it's ever been right now. No other show in existence could adapt itself this well across generations to the changing world. If this honestly ruins Homerpalooza or The Way We Was for you, you should have stopped watching the show 8 years ago. In fact if you're honestly that worried about the timeline you probably should have stopped watching a lot earlier than that, because there's been plenty of contradictions loooong before this episode, going all the way back to what some of you would consider the best seasons.
I loved the references and the only problem I had at first was the lazy Kurt Cobain/Back to the Future joke. But the more I think about it, it might have actually been a really subtle direct jab at the recent Family Guy joke. The lines, vocal inflection, the way it was delivered, and even the guy on the phone's name (Marvin) was exactly the same as it was in Family Guy. Most likely they were making fun of Family Guy for being lazy themselves (and everyone else who's done this joke).