Are there coffee shop espresso machines where — other than necessary gaskets — water does not ever touch plastic and thus, all internal piping is metal?

Coffee shop espresso machines are used to make espresso drinks and also heat up water for other drinks such as hot chocolate/cacao, and teas (loose leaf and matcha).

What is the hallmark of coffee shop coffee machines where all internal piping is made of metal (copper maybe) ? Are La Marzocco espresso machines the highest tier for espresso machines?