The Tiki birds attraction has some sentimental value for those of us over 50.
Back when the MK used ticket books, the "Tropical Serenade" was a 'D' ticket attraction. Other 'D' ticket attractions were the Riverboat, the Railroad, the "Flight to the Moon" and the Skyway.
So you had 4-D tickets. Well the Riverboat sucks now and it sucked then - leaving the other four attractions as your choices. So the Tiki birds were a part of your plan. And it was a "next-to-the-best" level attraction - so it HAD to be good!
And the Tiki Bird attraction (or maybe it was the Californian version) was featured on the Disney TV show. If you saw it on TV, it had to be something that you HAD to see in person!
Because of these, it was a popular attraction. There was a long line to get in. And it was very amusing and it made people happy.
Probably about ten years ago, WDW tried to update the attraction by inserting Iago (the parrot from Aladdin). This didn't interest the kids and it offended the sentimentalists...so Disney switched it back.
Forward in time to July 2014...I took my kids to this attraction. We were almost the only ones in line. It was the same attraction as in 1972. But my kids were actually mad...mad at me for taking them to see this show.
Sigh.