The early releases of OS X were far more primitive, so more work needed to be done on the basic building blocks (e.g. CoreImage or CoreAudio). Besides that, half of these features I have never used:
- Dashboard: never used it. Fiddled for 10 minutes and decided it's not useful.
- Automator: maybe some Alfred workflows that I use, use automator, but I never used it directly. I also don't think anyone outside power users write automator scripts. And these are the same people that can benefit from APFS or Hypervisor.framework.
- Spaces: gone. I am still sour about this though ;).
- Time machine: not that great in practice. Especially with a Time Capsule/Airport often results in backup sets that are broken.
- Cover flow: never used it, not saw the point.
- Boot camp. Never used it.
So, I and most Mac users that I know don't use half of these features. I also know quite many non-techie users that don't even know that Spotlight exists (they launch applications via the Dock and use Finder).