What about the potential mineral leeching issue with RO? I use a RO filter and mix it with 30% glass bottled water, both for taste and in hopes of avoiding any potential issue with leeching. I searched a bit but found nothing useful on the topic.
Sounds like a massive waste and headache for basically no benefit.
I have no idea how real the risk is, and it all seems less risky than drinking unfiltered water in most areas.
But it's no headache for me to mix RO water with bottled spring water, since I prefer the flavor and it takes seconds.