I've been in this business for more years than most.
I already had a funny feeling that you would be a dinosaur ;-)
I feel like a youngster hahaha
But i must agree with your statement.
Most people use wat's familiar or what friends use.
I believe that age has also something to do with it.
Influence of friends, schoolyard and so on and so on.
When they entering the "smartphoneworld" its always ( mostly ) starting with a messenger ( whatsapp is in my country populair ), facebook and some games like angry birds or asphalt.
Some of them are realy looking for new stuf, but thats mostly for a short time unless a new hype comming up like you said with flappy bird.
I am one of the few who dares to try something new, have opted for a couple of beta programs ( now only just one ).
But indeed the most apps i own are Droidcounterparts of the ones i used for a very long time.
I even let one ( a forummember ) rebuild a droid app special for wp, i know a lot of things and one of them is that i know that i cant write code, not like that.
The people i know with a windowsdevice dont even know about the previews and were surprised with a suden update.
Something we new months ago that it would happen and what is was.
There are a few type of people.
The average user, dont care a less as long if it works
The somewhat advance user, the ones who nearly discovered how to change there wallpapers and other settings.
The superuser, knowing there phone in and out and know what they are doing.
And the wanabee techsavie superuser, Pretent they know there phone in and out, but dont know what they are doing.
btw how's your 920 doing with the new update, or stil having nightmares ;-)