Every operating system has its flaws and one of Android’s is the update system. Although new Android 7.0 Nougat came out a few weeks ago, there are only a few phones that received the new update. The worst thing about the update is that many phones that can run the OS won’t get it.
Among them is Nexus 4, but thankfully there are custom ROMs such as CyanogenMod 14.1, which is now available for Google Nexus 4. The CyanogenMod 14.1 nightly build is based on Android 7.1 Nougat and is still in early phases of development so there could be some bugs.