Do we really need to go into the whole virus thing with Android?
Antivirus for Android ? do you need it? | Android Central
With that kind of thinking why does anyone use Windows PC OS? Install software from proper sources and you'll be fine. It's not that difficult. I have to admit I do wonder with the whole universal app thing how safe W10M will be now. But that's just me musing.
My Sony Z3 works perfectly fine. No hanging. I don't get anything like the 'resuming' I got on WP. Backup is just fine. Found WP backup more of a pain really.
As for the shiny app comment. It's about what works for you and what you want as a user. Nothing else. I'm not into phone wars or OS wars. I'm fairly agnostic on which OS I use.
Last I checked 2013 was almost two years ago. Things have changed since then.