I have no vitriol for all the steam competitors. Epic gives me a ton of free games that I don't play, gog releases are incredibly easy to pirate, all the proprietary ubi/ea/blizzard stores don't bother me cos I don't play those games.
By all means microsoft join the digital storefront battle and bring some more xbox exclusives to your PC store, exclusively. I'll obtain them the same way I always do every other game.