Just my take on Suds-ing/Foam-ing:
Pros:
-Nice to look at...maybe
FUN to play with;
-Provides a padding...something to: "cushion the blow" between
the wash-mitt (media?) and vehicles' panel surfaces;
-Acts as a vehicle-soils' "encapsulator"
Cons:
-Doesn't clean like surfactants will (probably no cleaning abilities at all!)
-Hard to completely rinse off vehicles at times:
Filmy residue.
Also:
-I remember the Ivory Snow Flakes and 20 Mule Team Borax "soap" days all too well...
-Suds, back then, were judged to be a sign of cleaning.
-Seems difficult for today's marketers to not advertise the same: Suds
=Clean-Philosophy.
-But there are different "cleaning-soaps" nowadays: Synthetic Detergents.
-Chemists can formulate their suds-level according to the car-care manufacturers' requests.
-Chemists can even formulate these detergents for "specialized-soils" removal
Often, if I want more suds from my car-washing liquid/shampoo/detergent:
-I'll just throw a couple of teaspoons of a sodium salt (table salt will work) into
my jug of car-washing liquid and let it dissolve before use:
Voila!!...I'll be able to have:
Suds/Foam up the ying-yang.
Bob