Even though the standard version of the Android One Moto X4 received the update to Oreo 8.1 back in March, the Project Fi's version of the phone is just starting to get the OTA update. However, users report a number of problems produced by the update so it might be a good idea to steer clear of the OPW28.1 version of the software for now. In any case, the update brings the automatic dark theme switcher, re-designed power menu and other optimizations and bug fixes. Or in other words, the same changes applied to the standard Android One Moto X4 version. Source
Source: https://www.gsmarena.com/project_fis_moto_x4_android_one_edition_finally_receives_oreo_81-news-30926.php
