Well, I can't say from my perspective that's even remotely true. With MS they launched with an exclusivity period. I would have preferred Steam to begin with, but it wasn't an option till august. I was actually about to quit because MS was so bad it was botching it's installs at random every 2-3 weeks requiring a full uninstall and reinstall (and it's actually, a lot more complicated than that, because it left 70gb of trash files behind in an admin protected area you can't touch normally without fiddling with permissions, each time it did it. Also since Sega doesn't use large archive files, and instead has over 100k regular files the PC file system has to track, it takes an absurd amount of time to move or delete these) To make matters worse, this problem was not something people would avoid entirely. Every single player would eventually have this happen at some point. Honestly I think this cost Sega a lot of players (at the very least, until the exclusivity ran out) Especially from the less technical players, because reclaiming the 'missing' space locked up in that bizarro windows store cache was not something the casual user knew how to do.
Steam on the other hand has never had that issue because it doesn't do weird fiddly crap hiding itself in protected areas. Personally I've only had 2 updates ever fail with Steam. Both of these actually failed because Tweaker was installed, without it, it never happened. It's actually the reason I stopped using Tweaker too, I only ever really had it setup to swap logins to MS for an MS promo w/o having to install another copy of the game. Ever since Tweaker messed that all up I've been more choosy on if I'll want to mess with an MS only incentive in the future, which is depressing.