New 21.5-inch iMac least repairable yet due to lack of RAM, hard drive upgradability - 9to5Mac
Apple iMac 21.5-inch 4K 2019 RAM Memory - Macfixit Australia
I got a FREE 2013 iMac 21.5 with internal upgrades including Samsung evo ssd and 16gigs of ram. Then used open legacy patcher to install Mac OS Venture 13.5 beta. : r/osx