It's never going to happen. POSIX has been around for 4 decades now. The longer something is not popular, the lower its chances to ever become popular.
The name might not be popular, but POSIX has long won. Everybody knows printf.
The thread is about the name.
This explains people who argue that Android is not Linux, despite it featuring a Linux kernel and self-identifying as so: They are intending to say that Android is not POSIX.
We need to make POSIX (as concept/word) more popular.