I very often see, or talk to, people that wish they could just be in one place. Have all of their messaging in one place. Watch or get all of their videos in one place. Get all of their games from one place. Why? Because it's a lot easier. And that's fair.
But I feel like this plays so strongly into any of these things becoming a monopoly or effective monopoly, that it absolutely must be avoided. Avoided in the same way junk food or clickbait is. It's unhealthy behavior.
It very strongly enables the "be a loss leader, pour money into the thing to gain marketshare to spend everyone out of business, then monetize" model, I'd even argue it's the core reason why that model works. No one wants another login, another window to keep track of, another app to open up to find the thing.
But, at least for the time being, I think it's extremely important to treat every single platform, service, whatever, as optional. One choice of many. "Yeah start getting shitty and I'll drop your ass in a heartbeat, I've got 3 replacements lined up" kind of relationship. Because that's as much as any big company deserves.
If you were wondering, the thing that actually spurred on this post was seeing an article about google's AI results and only reading it as "oh yeah, they want to keep you on the google page instead of having you clicking elsewhere. They want to be the arbiter of information, not the web page search results."