haha. its just hard to remember and track all the mods applied. in addition to that, some mods seems easy to install/apply, but what it actually does in the background, it changes some system related files and we dont see it doing so. take franco kernel for an example. flashing it is easy. but reverting it to stock for OTA update requires additional steps, as it actually modified the system thermal file. some other mods modifies system framework, but the initial installation was so easy as easy as one click