If you actually prefer the EMUI ecosystem but want features like built-in root, call recording, custom themes, and debloated software, optimized EMUI 8 custom ROMs remain a solid choice. They guarantee 100% hardware compatibility, including the camera's full capabilities.
Flashing a custom ROM in 2021 served several purposes for Mate 8 owners: Emui 9 update : Mate 8 - HUAWEI Community huawei mate 8 custom rom 2021