Instead, they are just killing the series altogether. It's near impossible to get sales numbers to back and theory. Certain FF games have been rereleased so many times, the numbers are skewed. FF7 for example will almost always top charts. I, and many others agree, the quality has gone down since FF10. FF13 sold a TON of copies, but as the first FF game released on a new generation, and the fact it was release on multiple platforms and not just PS, it's not a truly accurate portrayal of how things were. There's no denying the quality has diminished. But you're right... the reason they didn't release as different IPs was for the reason they knew they'd sell. Honestly, if FF12, FF13 and FF15 were different IPs (even related like a new FF), I doubt they'd sell because they were simply bad games. But naming them FF... it's false advertising to me. Nothing that made Final Fantasy, Final Fantasy, really appears in any game post-FF10.