- Backwards compatibility.
Also on PC, since forever and for way more games. PC also has access to various emulators that allow you to play many games from the past with updated graphics and not just some 360 titles.
Also available on PC. The EA Vault pass thing is also available btw.
- Best versions of 3rd party if playing on console.
PC has the best versions of 3rd party games. You can choose from different resolutions, frame-rates and customize settings to tailor your gaming experience to you needs. Maybe you don't care for 60 fps and wish to dramatically increase viewing distance, shadow quality and to downsample instead. Or maybe you don't care for that and want to play at 1080p/144Hz? Your choice.
Also available on PC. In addition you get access to proper high refresh rates, native 1440p support if you don't want to use all your power for 4k and good working adaptive sync technology for your unlocked 40-60 or 60+ FPS needs
Multiplayer is free on PC, voice chat is easy to do thanks to skype and discrod. There is no need to pay 60€ a year for that on PC. It actually was available many years ago. Nobody used it though, so it went away and nobody is missing it.
Works flawlessly on PC. In addition you get the possibility to use KB&M, tobii eye tracker, customize motions controllers and make them work with various games. You can use flightsticks for games like Elite Dangerous, Arcade Sticks for Fighters, 8+ button mice for MMOs, keyboards with macro functionality, DS4 controllers, Steam controllers and steering wheels.
You see, the thing about PC gaming isn't to check off random bullet points. You can build amachine for your needs and wishes. Want to play games from the past? you can do that and customize your PC for it. Want high refresh rates, a higher resolution but don't want to waste all power on 4k? 1440p displays with adaptive high refresh rates are a thing, even with HDR support. Want 4k/30? Doable. Want 1800p/60? Doable etc. PC has many controller options and ways to customize the input methods to your needs and desires too. You are not locked to one gamepad, you can mix, match and change stuff for every game if you so desire. You can make your PC do everything and to degrees way better then on consoles. The big exceptions are exclusive titles and the big downside is a much higher entry price.
But other then that, I don't want to go console only. It's just to limited and doesn't give me enough options.