I had an Android phone I had the Samsung Galaxy S5 for awhile. There were several reasons I went back to iPhone. The first is bloatware, there was tons of carrier bloat that I couldn't erase on my Android phone that took up precious space. The second was software updates, as an iPhone user, I get to have the latest and greatest software update for my phone as soon as it comes out along with every other iPhone user. With Android I have to wait for carrier and phone manufacturer to get it together and that often took a very long time, even for security updates. I certainly appreciate Android for what it is, but I would much rather have the iPhone.
My Galaxy S4 was still on Kitkat long after Lollipop was released and it would always say "Software is up to date" right to this very day!
Would I ever use Android again? No. I would rather use a Nokia N95.