Came here to also plug PEX. A friend used it for his remodel, did most of the work himself, and set everything up so all the lines come down to a sort of "switchboard" panel in his basement, so that as he did more remodeling work in the future he could disconnect individual loops trivially. It just makes so much sense and is so easy vs copper pipe.
Amusingly he told me one of the plumbers he did get a bid from said something like "well all PEX does is save you time and money" like it was a bad thing lol.
It’s also super easy and affordable to run extra lines that aren’t being used for future use. For instance, it might be you want to run a circulator across all your taps, but not today.
It breaks down pretty quickly when exposed to light, chlorine, and excessive heat. It's also very easy to damage. A kid being an idiot or rats and mice gnawing on everything like they do and you've got a heck of a leak that hopefully is caught quickly.
Seems like there's lots of situations where it's a good choice and lots of situations where it's not.
Amusingly he told me one of the plumbers he did get a bid from said something like "well all PEX does is save you time and money" like it was a bad thing lol.