[GSimon]

There's lots of software that is still being used on machines running Windows XP, some aren't connected to the internet and others are -gasp- risking the lack of windows support (which was generously offered for nearly two decades.) exposing their photoshop to vulnerabilities. You can be pedantic and alarmist about my specific example and ignore the general point of software compatibility if you want I guess. IRL there are 3yr old dated, useless iPads everywhere and that's not the same with even most 5yr+ year old PCs (which would have the specs to upgrade to a new OS and not break your existing software, if you choose to do so)