Understood. I wasn't trying to shoot down your point with a drive-by, just want more people to be aware that PEX, which is quite common in new construction for household drinking water plumbing, is a questionable choice for at least that purpose.

PVC, CPVC, and PEX are all commonly used in drinking water plumbing.

I can't offer a qualified view on irrigation or utility plumbing; not sure if PEX leachates are worse than PVC, etc.