I've been building Drupal sites since about 2005. I've been pleased with Drupal and all it's allowed my clients to do over the years. From a sole proprietor rolfer to the largest city in Vermont, Drupal has served us well. I'm pleased to be able to offer Backdrop services to organizations that aren't interested in the larger scale direction that the main branch of Drupal is headed in.
For some of my recent work, please see https://lcatv.org and https://rulings.law. You'll find the LCATV project described in the showcase section of the Backdrop site. Rulings.law is currently hosting 72,336 small pieces of content and purring along smoothly. Both of these sites offer some custom approaches with special custom code that makes them scalable and a good choice for the long run.
See also http://joegolden.com/ for some of my older work.
Backdrop on!