RO water is demineralized and the pH is impacted. It is not a healthy drinking water outside of occasional use. It is also not appetizing and thus it's easy to become dehydrated.

After years of RO water I switched to spring water due to health issues and I will never look back.

Of course, it is insanely expensive to drink 3L of spring water and so frustrating to not have unpoisoned water from the tap.