James Sweet wrote:

snip

I've only ever seen a couple houses that had galvanized pipes, and in one
case they were all being replaced. The sediment problem is something mostly
specific to galvanized, so it's not on the radar for most people.

Huh? Look most anywhere in the 'rust belt' or in areas where the housing
stock is largely greater than 80 years old ;-) Too bad that 'tutorials'
aren't directed at those situations to which they are most needed.

Michael