My elderly friend Elaine's system has been aging poorly lately. It's got 6GB of RAM and a dual-core cpu.
She mainly uses it to keep in touch with family and play open source games like mahjong and solitaire.
She explicitly requested #LinuxMint w/ #cinnamon because #Windows is too complicated (she came from #windowsxp before trying #Windows8 )
NewEgg had a $240 Optiplex 7040 that is a massive upgrade over her old AIO. SSD, 32GB DDR4, Quad Core i5, etc.
Old hardware still has a use.