I don't think Metro died because it was bad as a matter of taste. Quite the opposite actually, I wasn't a huge fan of its aesthetics but I was surprised by how many people liked it.
No, the real problem was functionality. Not of Metro itself - it was actually very good in that department, arguably still the best mobile UI as far as pure function goes. But the devices ended up being very limited overall because there were so few apps, and what was there was shoddy. Which was in part because Microsoft screwed up with the dev story, and partly because Google didn't play ball (so not only no official YouTube app, but they proactively killed third party ones that could do what the app does on oter platforms).
No, the real problem was functionality. Not of Metro itself - it was actually very good in that department, arguably still the best mobile UI as far as pure function goes. But the devices ended up being very limited overall because there were so few apps, and what was there was shoddy. Which was in part because Microsoft screwed up with the dev story, and partly because Google didn't play ball (so not only no official YouTube app, but they proactively killed third party ones that could do what the app does on oter platforms).