Apart from the historical value, the most important part of this article now is the “Note of reflection” added 10 years after it’s inception:

If your team is doing continuous delivery of software, I would suggest to adopt a much simpler workflow (like GitHub flow) instead of trying to shoehorn git-flow into your team.

I don’t think this work flow is relevant any more even for teams that don’t do CD, to be honest. It was a messy work flow to begin with and I haven’t seen it applied successfully in practice.

As an in-depth alternative, I recommend “Patterns for Managing Source Code Branches” by Martin Fowler: https://martinfowler.com/articles/branching-patterns.html