Strong mineral acids like HF, ABF, sulfuric, HCI are extremely corrosive.
Chlorinates are used to dissolve organics like fats and greases and are also used as intermediates in the production of other stuff like thinner, pesticides, resins and glue.
Exposure to some chlorinated solvents is potentially toxic.
So, there are many good reasons not to use string mineral acids or chlorinates.
Freestyler is really no different than other 5-brush roll-over or tunnel for that matter.
Since friction does most of the work, a fairly neutral soap (typically alkaline pre-soak) can be used to breakdown dirt and neutral high lubricity soap can be used on brushes (tunnel).
With friction in-bay, only one soap (i.e. alkaline, high lubricity).
That’s why friction rollover is less expensive to operate than touch-less – less chemical, water and energy.