My point was that in gmail, tags dont inherit their parent when searching
Example:
- Action
- Task
- Closed
- Open
When searching action, its my preference to see all items tagged with either Action, Task, Open or Closed, but gmail only filters for Action
Nested labels were only introduced in 2010 or 2011. Can't remember exactly when, but they certainly weren't available when I first started and then stopped using Gmail. Something as basic as how to organize your email should not have been an afterthought.
It was probably a concession, not an afterthought. Google's whole thing with Gmail was "keep all your email, don't bother organizing, search will solve all."