Many plumbing features can be incorporated into a new home.
Two water heaters in series have almost unlimited supply capabilities when company comes or you want to soak in the large jetted tub. They also are more energy efficient because the upstream heater can be set on “vacation” during normal hot water usage environments.
The shower faucet does not have to be a simple on-off valve with a spray head. Showers can have hand-held sprays, multi-head full body massage spray patterns, even steam saunas.
Shower walls are no longer always 4″ x 4″ square wall tiles, usually white. Any number of beautiful tiles are available in all sorts of shapes and sizes. They can be installed in as many designs as the mind can imagine.