For those who don't have water accumulators in the system - replenish air bubble in water heater helps a lot.
Usually I hook up dry hose, open the water flow and run hot water inside, what push some air into WH tank.
That gives me about 5 seconds of water flow with pump off, what is good for washing hands after midnight pee.
The variable speed pumps are the only ones used in household well systems all around the World, but they did not catch in RV.
I think the price and voltage spikes make it too difficult.
From all RV pumps I had the quietest was belt-driven one in 1965 Airstream.
I restored the TT about 6 years ago and was surprised the pump model was still in production and sold in marine places for $350.
I was still able to buy rebuild kit and 45 years old pump work very well.
Now I put new valves seal 2 years ago into my $39/18 yo pump and it works well, so I have no motivation to upgrade it.