How many games do you need to be interested in before you buy their console?

I was on the verge of buying a PS4 solely for Persona 5, but I didn't. I'm still a bit broken hearted, but I can literally play anything else (even KH3, FF15 and MGSV) on my X Box 1.

I will get a PS4 someday, just for Persona 5, and maybe Last of Us. But not today.