CyanogenMod may be dropping platinum albums these days, but that doesn't mean that the project isn't still cranking out nightly builds for new devices, just as it used to do in its underground days (I totally listened to them before they were big, you know).
This time support has come to the Samsung Galaxy Tab S 8.4. The new nightlies are for the Wi-Fi version of the tablet, klimtwifi.
The Galaxy Tab S 8.4 has been around for a year and a half now, which is a good thing, because that makes it easier to find on sale. For a device you're going to flash and run the inherent risk of bricking, making a smaller investment helps. Of course, this assumes you don't already have one. If you bought the tablet while it was new, you're still free to have at it. Since you're reading this, you're probably tired of TouchWiz anyway.
I'll just leave the link below. You do with it what you will. And if you grab TWRP on the way, that's on you.