GOG being pushed out of the market. They're one of the only stores that actually give you ownership of your games, and they don't have the same indomitable foothold that Steam does.
It would be all too easy for Microsoft to strangle one of their key markets by taking a loss on sales and offering publishers 150% sales price in exchange for exclusive distribution of 90s and 2000s era PC games or console ports.
They really brought in those big dollars with making Borderlands 3 a timed exclusive on Epic. A whole 9%. Meanwhile, 91.6% of respondents preferred Steam. Bravo, Randy. Bravo.
Disappointingly, 53.9% still would buy it on Steam if it influenced exclusivity going forward. Even if it is Steam—which has a record of providing better service than its competitors—exclusivity helps nobody.