I don't know if it's still viable but few years back I used to use my old Android phone/phablet as extra monitor for my pc to monitor stats with Spacedesk. It runs on wifi and gives you the ability to add multi devices as monitors so potentially you can make all your old phones into many monitors for your pc as long as they are all on the same network.
art_of_onanism
joined 1 year ago
Asian VPS to bypass GFW in China so I can go on Google and such