Strange they are the ones I would have least confidence in. They already thought about getting rid of the division once before.
Sony and Nintendo this is their core business and they rely on gaming. MS has other profitable divisions and could get rid of Xbox today and still be doing just fine as a company.
There's a couple of reasons why I feel this way.
1. Their integration with pc and cloud. I can easily switch between playing on xbox, pc and Cloud. I can resume my games seamlessly on any of these devices.
2. They seem to care most for game preservation. I currently can play 4 gens worth of xbox games on my series console. I'm 99% confident at this point if ms wanted to they can release an xbox app on mult devices that would play xbox games just by inserting a disc or downloading the game within the app.
3. Their customer service is pretty good. If sony or nintendo were to go down I can see them not giving 2 shits about people's libraries.
Ms on the other hand has the money and engineering to possibly offer an alternative. For example even with the rumors of them maybe leaving the console business it would open 3rd parties to make their own "xboxes" to run "xbox" games.
I can see how people would feel the opposite though since they are dead last and can be seen as potentially exiting the business.