I started P3P a couple weeks ago, hoping to finish it by year's end, so I can 1. finish it before P3R and 2. have enough cooldown time before P3R comes out. My pace isn't great, I'm only about 4 hours in.
I also started P5S back up. I was already about 6 hours in and would like to finish it before P5T. So I have 4 months or so. But there's also about a dozen new games coming out before then that will take priority. Ugh, the planning of a backlog. At least P5S and P5T are both sort of their own thing, so I don't really need to play one in order to enjoy the other.