These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The 1979 animated short subverts this. While it has been screened sporadically on Play School for over 3 decades (even during the run of the live-action adaptation), many toddlers would naturally think that the short was somehow inspired by the live-action series and not created before then. However, to the eyes of a preteen and older, it's plain to see in comparison to other animated shows on television nowadays that it was obviously created a long time ago.
A lot of the songs featured on the show, but one that particularly stands out comes from the episode "Radio Bananas" where the Bananas manage to run their own radio station at Rat's shop. An accident during one broadcast warrants an "oopsie", which accidentally finds its way onto the airwaves. The song that the Bananas make out of this will not leave your head.
Every song in the 1997 Bumping and-a Jumping special. EVERY. SINGLE. SONG.
Uncanny Valley: Some might say the old series fell into this trope, but the new bananas have lips... and teeth... and eyebrows.
Not to mention Rat looks completely different from his earlier incarnation.
What Do You Mean, It Wasn't Made on Drugs?: More so in regard to the older suitmation adaptation. There's something slightly unsettling about seeing two giant sentient bananas wreaking havoc in a district populated by talking teddies and a giant talking purple rat.