Speaking for myself (not the person you asked) I still have machines on El Capitan and don't plan to upgrade them because they just work. High Sierra almost com

Speaking for myself (not the person you asked) I still have machines on El Capitan and don't plan to upgrade them because they just work. High Sierra almost completely bricked them. Every new version of MacOS is more buggy than the previous and it takes dozens of hours of googling to figure out how to work around the bugs, restore features Apple removed, and turn off misfeatures Apple added.