Many of these sound like good advice. Some I've heard before.
Never get involved in a land war in Asia.
This one pops up from time to time, and I'm never sure if the one offering advice means it literally or figuratively. If it's meant literally, it still sounds like good advice (see Korea, Vietnam, Afghanistan (1979 and 2001), Iraq), but applies directly to only very few people. (It could also be meant literally, but specifically refer to the board game Risk, where conquering Asia gives you the highest reward, but is almost impossible to accomplish.)
Figuratively however, it could just mean "don't get involved in a fight you cannot win", which is definitely good advice, but it would be more clear to just spell it out.
You could never get away with releasing a “Batdance” now — the movie producers would demand something far more accessible and poppy
I was going to suggest Madonna's Die Another Day as a counter-example, a high-profile theme song to the sixth-heighest grossing film of 2002, in a non-mainstream genre. (According to Wikipedia the song is in the genre electroclash, which I'm pretty sure I've never even heard of until today.) While maybe not quite as experimental as Batdance, it was very divisive, nominated to both a Golden Globe and a Raspberry award.
Then I realised Die Another Day came out closer in time to Batdance than to today...
I think my first encounter with Weird Al's music was The Saga Begins, when I was 15. He wasn't very popular here in Norway before that, but after the introduction of file-sharing software, he quickly became popular among kids old enough to understand the English-language lyrics.
Let's hope a new album isn't too far off. 2014's Mandatory Fun had some truly great songs. I sometimes sing Foil in the shower.
Actually, come to think of it, my first encounter with Weird Al might have been the film Naked Gun, although I didn't know who he was at the time.
There's a scene early in the film, when detective Frank Drebin returns heroically after defeating every single one of USA's enemies, when he steps off the plane and sees a press conference prepared, he steps up to the podium and starts talking, only to be interrupted with the explanation that Weird Al is on the same plane, and the press conference is for him.
One of the great things about that scene is that the joke is equally funny even if you don't get the reference. It's of course neat for Al's fans to see him on screen, but it might be even more funny that the returning hero is passed over for some silly-looking guy you've never even heard of.