That's true for most MMO's though so by that logic they're all dying, they're all a fraction of their players active Vs created.
ESO: 14,638,045 total players VS 695,307 active players
WoW Clasic: 23,378,742 total VS 1,332,588 active
FFXIV: 19,337,062 total VS 1,653,319 active
I see none of these "death flags" that 14 is going to suddenly or even slowly die, it's only grown and is holding fine numbers.