Do you think the game would die without the PC playerbase?

[ItMe]

Anyway, the question comes from the occasional person who claims the game would die if certain things were to happen regarding third-party software and add-ons.

I earnestly do not understand how anything add-on related could kill the PC player base, especially since this game doesn't need add-ons at all (unless, arguably, you're talking about 3rd party /perform support).

But to answer your question: I don't think so either.
There are successful MMO out there with a smaller player base than what FF14 has on console alone.
If the PC players all left (and didn't swap to console, just... left) the game would radically change with such a drop in revenue, but saying it would die is just silly.