Only if I found it to be an enjoyable game then yeah I'd play it. SE themselves thought people would drop XI for XIV 1.0 just because of the pedigree but that burned them quite badly as we've all seen, and I imagine it would happen again if they pushed out a new MMO that is barely an improvement or just more of the same.

So it'd have to be something pretty damn amazing to make me want to stop playing this, even with its quirks and flaws. I'd still be playing XI in fact if money wasn't a bit tight due to ongoing circumstances.