[Cajundaddy]

There is no perfect plumbing and I think it depends on your situation. Pex is flexible and expandable so far fewer fittings and far less earthquake or freeze damage prone. The downsides are chafe and rodent damage.

My daughter had a condo built in the 2000s with all pex that ran through the attic. One or more of her neighbors had low cleanliness standards, attracted rats to the attic and over a 6 month infestation she had water raining down from several leaks in the attic. Samples of the leaky sections verified rat chew caused it. With the help of homeowner insurance she had the entire condo replumbed in copper and it solved the problem. It was a major hassle until repairs were completed.

Most of my homes have been copper with very few issues over 40 years. Some time after the 90s earthquake swarm we did develop a leak where wall meets slab in the kitchen. The repair required complete demo of kitchen floor, cabinets, and counter top. This too was mostly covered by insurance and my wife got to pick out new cabinets and countertop which actually pleased her in the long run. It was a month total time for the demo/repair/remodel.

Our current home is all pex with lines run in the walls and crawl space. I see very little exposure or opportunity for rodent damage so I think this was a good choice. Five years in and all is well.