Then there are clone apps for allmost all the apps you mention (Instagram, Vine, Youtube, Dropbox, Starbucks, Hangouts). Probably not as good [1], but they work and often there's a native way to accomplish the same thing, making an app redundant (i.e. install Filters and share from the Pictures Hub instead of using Instagram).
[1] http://pocketnow.com/2013/08/14/missing-apps-on-windows-phon...
That's not how social networks work.
Could you think of a less worthless feature to demonstrate with though? The YouTube app is getting so bad (certainly on iOS, I assume with Android too) that it's getting where the website will have a better UX than the native app shortly.
None of those have any real value for me personally so I can understand where Android might be more suitable but I really don't need an app for any of those.
As for trip advisor city guides, Nokia Here Maps does the same stuff offline (and a load more!)
The only missing point from above is that YouTube works fine in the browser. The press are full of shit about interoperability there. Not only that there are a multitude of quality youtube apps but you don't need them.
That was just going through the main homescreens on my Android.
> I actually only use three "apps" that aren't built in on my WP8 device.
I'm not sure what you're trying to say here... You can't use apps that don't exist, so it's not surprising at all to me that you "only use three apps" that aren't built into the device...