Why are very few metals used for plumbing anymore?

Very few metals are used for Plumbing today primarily due to concerns over corrosion, leaching, and the potential health risks associated with certain metals, like lead and copper. Modern plumbing systems increasingly utilize materials like PVC, PEX, and other plastics, which are more resistant to corrosion, lighter, and easier to install. These alternatives also provide better thermal insulation and are often more cost-effective over time. Additionally, advancements in materials technology have led to the development of long-lasting, durable solutions that meet modern plumbing standards.