Oreo update has been pushed via OTA on selected 2018 OLED in France.
Build number is TPMD171E_R.107.000.222.001
Some issues already have been reported by these French owners, like a decrease in sound volume over time / audio delay issue; the lost of individual ISF parameters for SDR and HDR (seems common/ unique for both SDr and HDR ?); some external USB hard drive are not detected anymore.
Color posterization issue is still also very present (mainly with HDR content) = not better with Oreo.
Still no Youtube nor Amazon Prime Video HDR available.