u/fabfrankie401

I'm in the process of replacing the old galvanized steel pipes with pex. This is out of necessity because the galvanized is rusting from the inside out. Pieces of metal shoot through the lines and destroy faucets, etc. I'm bummed I have to do this. Anyway, the existing on/off toilet valves are in the wall. My plumber says that the new pipes will have to go through the floor. What are the pros and cons of the toilet valves going through the floor? Has anyone dealt with this? is there a way to keep them on the wall? 1950s home. Plaster walls. 1st floor with crawl space below.