So even if I have this set on developers options I have to install root from Lineage OS extras, right?
And if I'll update the ROM with latest nightly, I'll have to reflash root?
It's still part of the pre-official rom, but once it goes offic...
Nevermind. Got it working, I flashed an old version of supersu which caused a boot loop. Thought there was something special I had to do. Turns out I just needed the latest supersu.zip. Damn Google search, the first result was an old package.