The large OTR trucks have batt powered air cond , for their sleeper cabs, for a decade.
Problem is its only about 5,000 BTU so it does fine with a small cabin but can not do multiple cabins or the entire vessel.
Noisemakers can be very quiet , usually best if fitted with a lift muffler.
To me the trade off for a big complex boat is a non issue.
I am far to lazy to desire to spend my time repairing nice to have mountains of equipment..
Must have gear , no problem , but my list is very short, probably shorter than the folks on a 35ft rag boat.
Anchor windlass, auto pilot both hyd, propane range , propane reefer, manual toilet HW heater underway and Dickinson diesel range (I don't enjoy the cold.)
Pressure water to the sink and head/shower, cabin fans, reading lights.AM FM car radio & good speakers.
Aluminum Grumman sailing dink with Oars. Off the top of my head that's about it.
Being lazy allows me the time to enjoy boating , my hobby , not onboard marine repair .
At anchor I love the bright boats with varnished hulls , true eye candy .