Do I Have to Rebuy Games on PC?

We all dread that moment when we need to uninstall some of our beloved PC games to make room for new ones, right. I do, especially after dedicating countless hours exploring hidden secrets in The Elder Scrolls V: Skyrim, or downloading more than a hundred mods for me to put into Fallout 4. That being said, every game has its eventual end, and new games will replace them in one way or another.