We have one at home. Does take some getting used to.I know that a lot of aged care facilities are getting water saving grants to replace toilets, showers, washing machines and install new water tanks.
It's hard to shower with a friend with one of those watersavers.
Just move to England. They have no water pressure.
Trouble with showering with a friend is that are likely to be in the much much longer........or need a second shower a bit later.