I run Kodi on a Pi, it's sluggish, gets hot and has trouble streaming full quality blu-ray rips.
I run a main desktop PC with about 10TB of storage on it then stream to various devices throughout my house running Kodi.
Android boxes, Laptops, a Pi and an Alpha.
Android boxes and the Pi work for the most part, but my Alpha and other PC's are seamless. That's why I'm looking to upgrade in the livingroom.
I'd prefer to run Windows because my wife likes to use apps like Songza etc. on the Android box. Hard sell to tell her I'm changing it and it won't have apps anymore.
I like using Kodi because it keeps a consistent feel from room to room. Also granted the hardware can handle it, it'll play anything you throw at it. Not many devices can say that, especially when it comes to true HD audio.
Sony 75" X940D, 7.1 Klipsch, Onkyo TX-NR656, Xbox One/360, Nvidia Shield Alienware Alpha, Arris Gateway, 42" Samsung