If you want a short answers it is a text editor. If you want the long answer i might not be the best person for it but here it goes: You start using it as a text editor but it is a bottomless pit of freedom and practicality, where you put 100s of keyboard shortcuts into muscles memory, and one day you will find your self replacing your terminal with emacs. Then you forgot that GUIs exist all together. You will feel an urge to make fun of vim users. Somewhere along the way you’ll start waching videos of Stallman, and form a desire to overthrow the proprietary overlords. Turn back now! ;)

Every opinion is valid and people can disagree with it. But have you considered that there are museums of torture devices, or substance abuse. In that spirit what are the games that could should be remembered as a cautionary tale? For me it would be heroes3, minecraft, rimworld. These took most of my life (rotted most of my brain).