Who will own and run Steam 30 years from now? Gabe Newell will be long-gone, his nepobaby next-CEO will be closing in on retirement if they don't check-out early to enjoy their vast wealth like Gabe has done.
What does Steam look like 60 years from now? Adults using it today are mostly dead and all of their licenses revoked forever, the games removed from circulation gone forever because nobody can ever have a license to use them again. They might be onto their 4th, 5th or 6th CEO by then, half a century removed from Gabe and any expectations we have around the ways he did things.
There's a lot of room for improvement securing some sort of legacy for Steam.