Lu,
I hope you are feeling better. We need the comments from older members with real life experiences (and strong opinions).
About centrifugal force.... Scientists are currently trying to condense all the forces into one grand force that will be called the the Theory of Everything. Right now they are down to four forces:
1)Elecromagnetic
2)gravity
3)strong nuclear
4)weak nuclear
Centrifugal force(or acceleration) is still a useful word for describing the effect we feel and see. It's just not on the condensed list of four forces.
New generations will be taught differently as the wording changes with time.