Older homes near downtown and on the bluffs
Bungalows and older two-stories often still have galvanized steel supply pipe and cast iron drains. Galvanized narrows from the inside over decades, which is why the shower pressure is weak even though the city pressure is fine. If the walls are open, it makes sense to replace it with PEX or copper right then. Tile was often set on a thick mortar bed, so demo takes longer and the floor height can change once it is out.
Mid-century ranches and split-levels
These tend to have small baths with a window over the tub, which is a problem when that wall becomes a tiled shower. We either replace it with a vinyl or obscure-glass unit set up for a wet wall or close it in, depending on how much you value the light.
1990s and 2000s subdivisions
Here the bones are usually good, but you find one-piece fiberglass tub units, bath fans vented into the attic instead of outside, and particleboard vanities that have swollen near the sink. These remodels tend to go quickly because the plumbing is modern and easy to work with.