Fom that list, PC, PS4, Wii U, New 3DS and Vita.
I bought the PS4 shortly after launch, but I've not really touched it since I built a new gaming PC last year (i5-4460 3.4GHz, 16GB RAM, Radeon RX480 8GB GDDR5). I'm now keeping my PS4 on firmware 3.50 to see if any exploits appear.
My Wii U, New 3DS and Vita are of course all using the latest exploits.
I'd love an Xbox One but if I had that kind of money, I'd put it towards PC upgrades.