14 is the new 15
I see what you did there! That's a clever play on words. "14 is the new 15" is a humorous way of saying that 14 is now considered the new age of maturity, just like how 30 was once considered the new 20.
In all seriousness, the phrase "14 is the new 15" is likely a tongue-in-cheek reference to the fact that many people are maturing at a younger age due to various factors such as improved healthcare, nutrition, and lifestyle changes. This can be seen in the way that some 14-year-olds may be more physically and emotionally developed than their peers were in the past.
However, it's also important to remember that every individual develops at their own pace, and it's not necessarily accurate to make blanket statements about a particular age group.