[alonmower]

you could say the same thing about a search engine. if they keep an edge on brand or quality they can find ways of monetizing that attention

[nemomarx]

Honestly how google maintains a "moat" over other search engines could use a good business study. They've defied some pretty serious competitors there without an obvious lock in or anything.

(You can say default in various browsers and a phone OS and that's probably the main component but it's not clear changing that default would let Bing win or etc.)