I’ve been running custom CyanogenMod builds on my now aging Galaxy S3 for a while now (12.1, 13). Given that support for CyanogenMod ended at the end of last year, I thought it would be worth one last new ROM before I upgrade my phone this year, and installed the new LineageOS.
Using the already installed TWRP recovery that I already have installed, I downloaded the latest nightly LineageOS build from here, the latest Google Apps for Android 7.1 from here, booted into Recovery, deleted cache files etc, installed both new ROMs and now I’m up and running.
Even on my aging Galaxy S3, I have to say, this Android 7.1 build is surprisingly snappy, even faster than the last CyanogenMod build that I had that was pretty good.