[halikular]

What you said can also be true with a modern linux or bsd install. Use something like arch linux or nixos and only install the bare bones like a windows manager, text editor, irc client and a web browser. You'll have no notifications, it's all up to you and you'll also have an updated and secure machine.

[wainstead]

Or even more extreme, perhaps, TAILS on a stick and you just yank the stick when you're done. As long as you don't connect via Tor you're all alone.