Does 1x not cause really heavy chain wear due to the angles you'll have in the chainline when you use top and bottom at the rear?
Don't think so...certainly no worse than using your middle ring the majority of the time. It's better these days because Race Face cranks have axle spacers to help improve the chain line further.
It's certainly a hot topic. I dint think it's the second coming like the press are pushing it as, especially when many people have been doing it for ages. I think the big benefits are improved clearance, no chain suck, less cables and clutter. But at the expense of really easy gears for getting up steep stuff. If I still lived in the peaks, I would probably still be running a 2x set up.
2015 Stanton Ti Switchback
2006 Specialized Demo 8
2013 Specialized Allez Sport
1999 Santa Cruz Chameleon
1994 Cannnondale Beast of the East (rebuild still in progress)