My house was built in the 50's.... copper pipes....never have had a problem. Keeping OEBT's, TT's, CRS, CBS and mischlings all is and has been ok. I think new copper pipes need to "age". Anyway I would worry about copper except in new pipes or hardware.
They come "aged". They oxidize Sitting on the shelf.
People don't seem to understand that when we talk about copper toxicity were talking about excessive copper dosing or copper based meds. Incidental copper isn't relevant.