Not to mention, it is entirely possible to get home from work, play, and then realize you are now late for work.

Its just engaging on a level that most modern game's can't hope to achieve.

Hell, I've installed a game (old), then installed mods, then resolved all the mod issues, then launch it to realize I don't actually want to play it.

Factorio? Mods are easy, and vanilla is enough to keep someone occupied and happy if they lack internet or something.

Its light weight too, it costs me virtually nothing to install it on anything that can run it.