You can't compare this. There are much less bad actors in mobile traffic that constantly try to steal your keys, try to suck gas from your gas tank, hide in your trunk or trick you into insurance fraud...
And what they can't copy, the will buy with their monopoly money: Yahoo bought Tumblr, Flickr. Google bought Android, Youtube. Apple bought beats, siri. And all do a lot of acqui-hiring which kills competition in early stage.
this can be a good way for europe, too. after the last court ruling: https://www.cnbc.com/2020/07/16/european-court-rules-on-face... there must be changes. Maybe this means us users can't see eu users in the social networks and vice versa. But then we could finally post our nipples on instagram!
You don't know if it's the best because there is no competition to discover better info. All other websites are presented with only 2 or 3 lines of text (search results) and have no free access to presentation forms that googles own content has.
The bloggers went to places where the eyeballs are. If you read a good book, make photo and post it with a comment on instagram. You will get much more reaction than with a blogpost on your private blog. Same for forums. If you are looking for a community with a special interest you will have more luck to find an active facebook group than a independent forum/message board somewhere else.
"Although the evidence is sparse, I feel that you shouldn't start with microservices unless you have reasonable experience of building a microservices system in the team."