Dave1482 , via OnePlus 7 Pro , Mar 25, 2021 : Welp, I managed to update my rooted OnePlus 7 Pro to OxygenOS 11! However, I cannot recommend anyone to update to it because you lose TWRP (currently no support on OOS 11), Magisk Modules don't work (all of them need to be disabled to boot), and Swift Installer (theming with root) does not work either. I will continue to use it, but I suggest anyone to just wait for Magisk and TWRP to get updated. UPDATE: It turns out the issues with Magisk were due to an old version of the Taichi module. TWRP 3.5.1_9-0 has been installed but won't boot.