I'm not sure how common that is, but I've definitely bought 2 games after the "removed DRM" event. (Basically allowing me to play on Linux in pre-steamdeck times) I'm aware that lots of people don't care.

Sure lots of people don't care, but if you save money on DRM subscription fees and see a tiny bump in sales it could be worth the tiny amount of dev time. Assuming you set it up to be easily removed ahead of time.