I got the xbox one three games. One of which was cancelled (scalebound), and one of which came to steam the same year (Quantum break).
So in essence I got the xbox one.. for SSO.
I'm interested in FE warriors. It is coming to the N3Ds and the switch. I'm not going to have a switch by then so I'm getting it for the N3ds. If it wasn't coming to the 3ds? it would be yet another game in the "reason to get switch" pile.
Heck I got a wii U for Bayonetta 2, and I got the ps4 for infamous second son and didn't touch it again a year later.
If you weren't into FF you probably wouldn't get a ps4. If FF was exclusive to PS4 though? People would buy one.
I love FF. But one game is not really enough to convince me to buy another console which I doubt I will use a lot after completing FFXV. Also it isn't a good practice with 3rd party exclusives. I think that these practices shouldn't be supported by the gaming community.