At work I pick my bike and throw it at my students as part of the defensive tactics training, never dropped a chain. Spent a week at Whistler, 2 months in Iceland, 2 weeks in Kenya, yadda yadda, never dropped a chain. It's not that I ride like Julie Andrews, it's cos I know how to set up and maintain my machine, and I'm sure the rear many others out there who've never felt the need to go 1 x 11 or fit a chain device. We're more numerous than you think.
That's fine. I don't feel the need for more than one chainring and get up everything I need to.
Some people like single rings (many who can set bikes up) others like dual or triples. It's all choice...if you don't like it don't use it!
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)