HiBefore the rise of Substratum , there was the CyanogenMod Theme Engine (CMTE). Introduced all the way back with CyanogenMod 9 (based on Android Ice Cream Sandwich), it added system-wide theme capabilities to CyanogenMod builds. With the release of CyanogenMod 14 (which later became LineageOS ), CMTE was nowhere to be found. Meanwhile many other popular custom ROMs started to favor the OMS-based Substratum Theme Engine in their builds. And with Android 8.0 Oreo now including native OMS support , it appears that the LineageOS team has now pulled the plug on CMTE for good. We had already heard from a source some time back that CMTE was basically dead, but there was still a glimmer of hope by some users that it would, someday, return in LineageOS. Alas, that does not seem to be the case: as a part of the LineageOS 15.0 bringup, the guts of the CyanogenMod Theme Engine, as well as all remaining mentions of the theme engine are in t...