RedHat still pushes their changes upstream whenever possible, and is one of the largest OSS contributors. These changes were to make it harder for companies like Oracle who feed off of RHEL. The same reason you can’t view RH support docs any more, Oracle used to reply to their paid users (running RHEL clones) with copy/paste from the RH docs.

And mWh is even bigger.

If you have a lot of carpet you probably want an electric/powerhead attachment (the spinning brush uses a separate motor instead of airflow). For hardfloor with the occasional rug, the bare floor and maybe a turbo head should be enough.