We know that rooting the S5 trips your Knox counter to (0x1) meaning that some features will be broken. I rooted my SM-G900F with the ChainFire Root and Knox shows (0x1).
1. I am still able to use Private Mode, though some users have said it doesn't work for them once rooted.
2. I am now unable to check for Software Updates on my device. Screenshot attached showing error.
Anyone else have known issues or would like to add to the list?