2012 Ivy Bridge MacBook Air with 8 GB RAM: Recent macOS versions have become slower and slower each year. Among those unsupported releases that can still run v

2012 Ivy Bridge MacBook Air with 8 GB RAM: Recent macOS versions have become slower and slower each year. Among those unsupported releases that can still run via OCLP, it is easy to notice all the newly changed stuff because those start and react much slower. Every interaction with, e.g., the control center or the new system settings is just a pain. Also, the system + my login items would occupy ~4GB RAM at startup. With Ubuntu, the system feels like new. It has a lower base load of only 1.5 GB RAM at startup, and with zram + dynamically sized swap files, the system has much more legroom to multitask. Everything feels fast again, and I don't need to use a 3rd party tool that disables Intel's Turbo Boost to keep the fans quiet. The overall load on the system is so much lower that even with full boost clocks, it needs much longer to spin the fans up.