A few years back I was given an old 4GB Macbook to use temporarily when I started at a new job. Thing is, I could have kept using it indefinitely for the actual work, for which it didn't feel slow—but Slack (Electron) and Asana (project management... webapp, thing, that liked to eat tons of memory & cycles for no reason, at the time) were must-use tools and just having them open with nothing else brought that poor machine to its knees.

Cut out webapps/Electron and it was entirely fine, though. Like if we'd just used XMPP or something instead of Slack I might even have been able to make it work without serious issues