@Lakotaubp I apologize for my fellow Moroccans, but I will not apologize for any other stuff nor will I discuss this further as this is not the right place for this kind of discussions. Again, I'm sorry If I offended anyone, and sorry for the language.

Indeed please do not confuse things: The stable Nexus 5 on Legacy 5.1 porting is super-stable. This thread you mentioned is about an alpha stage build for upgrading to an Android 7.1 base. Its fairly unstable but will become better and better over time. However for daily use only use the installer-provided stable image.