Ya but we are not talking about the worst case scenario. I'm talking about health.
Healthy plants will thrive and produce better in both quantity and quality ending with great production.
Same for a dog.. You feed a dog grade A food, dog will have a higher chance of having healthier longer lifespan versus bad degraded food supply. In general health is important if you want to push it to the limit and have a great appreciated outcome and you will be happy in the end.
I am not slamming tap water.. I'm using tap water.
I would like to try RO and I think I should see some changes if you have your nutes dialed in first.
RO is a plus because you know whats going in nute wise and balance, which sometimes leads to no flushing until harvest and not running into problems and slowing the process.
But when using tap water don't over feed since tap water will sometimes contain some food, depending on the readings/testings of course locations, times of the year all plays a role..
By filtering out excess salt build-up, growers can maintain the quality of their water, and encourage nutrient-absorption, to provide optimum grow results. Basically, ensuring water quality takes a bit of effort but is essential to a successful grow - therefore well worth the effort!