There are a lot of government internal and external sites (probably others, but I’m more familiar with gov’t) using old plugins that will stop working at the end of this year or early next year. I suppose some orgs will have an archive of $BROWSER $VERSION + $PLUGIN installers that might delay the required rebuilding of sites, at least internally. But really, isn’t there a day when you have to start buying old computers on Ebay to keep using plugins from 1945?