My main laptop is a 2010 MacBook Pro running MacOS Ace Ventura. I use this old guy for school, since all of my school stuff is just in a browser. My Main PC still runs Bimbows 10, Because its what I installed forever ago, and everything works fine, so im not gonna mess with it. Thats the thought process of most of my computers, "its working, im not gonna mess with it" Believe it or not I have a 3rd "main computer", a 2012 Mac Mini, Which runs MacOS Sequoia, and is the best Mac I own. Its a surprisingly good computer after upgrading to an SSD and installing 16GB of RAM, way before the RAM-pocalypse of course.