What’s important to remember is that the entire banquet scenario wouldn’t have been possible in any other sports anime.
Not because other sports anime couldn’t show a dance-off at an epic party but because other sports anime feature high school kids.
I think it is always important to note and highlight the fact that most characters in Yuri on ice are adults/are of legal age and that changes so many things about the show and makes it stand out from other sports anime.
The banquet scenario wouldn’t have been possible in any other sports anime because it would require underage drinking and most authors stray away from that topic (for obvious reasons). (Not to mention how well YOI handled the topic of drinking.)
The relevance of the character’s ages extends to many aspects of the anime, but the banquet is where this becomes most prominent and most obvious. It’s because Yuuri is 23 and can legally drink everywhere that the banquet scenario, the entire new ED sequence and the plot twist that changed everything was possible.
And I think that deserves to be mentioned.