You are already using ammend and rebase, you can do plenty of complex and hairy stuff with that, especially as a team. I'm also guessing you use merge and log at times. FWIW this is my philosphy with git too, but have you not experienced the points he brings up? I was nodding my head at all of them; branches are time-consuming, staging is problematic and forks are a bad analogy.

The recent post and hype about the Facebook, Google and Microsoft monorepos should make us ask the question what our systems for source control is supposed to do really.

  save changes to a source code
  save changes to big binary assets
  annotate those changes
  annotate the files themselves
  tagging versions 
  signing of code
  code review
  handle regressions testing
  collaborating (ACL, DCVS, official monkey patching etc)
  merging
  search on the whole code base
  refactoring on large code bases

All these things have uses but they are not really supposed to be tied to one VCS, we have very basic needs when working with source code streamlining the UX for that workflow might be more important and in the same time opening up for easy access to the other stuff.