For Steam in general: If you are not in a major hurry to get a game wait for sales. There are major sales a few times a year and smaller ones all the time. Add games to your Steam wishlist to get notified when it’s on sale. Check steamdb for price trends.
EXWM. I am a longtime Emacs user so merging the concepts of Emacs buffers and X windows is a huge benefit. Only one set of keybindings to worry about, all of my Emacs window management stuff works for X windows too. One less external dependency to worry about too. In a new environment (like when starting a new job etc) as long as I have my Emacs config I am good to go.
(early 8-bit era)