The reason for alcohol stoves in boats has to do with the fact that alcohol fires can be extinguished with water... that's assuming you can tell if you have an alcohol fire in the first place. Alcohol spilled on a counter-top for example burns with an almost invisible flame. Often the first indication of such a fire is the counter-top turning black at a surprising rate or maybe the curtains going up in flames. They have gone out of fashion even on boats these days. Most boats manufactured in the US since the 80s are equipped with propane cooking appliances. For a while there, CNG was popular in boats because the gas cooks like propane but is lighter than air so leaking gas won't collect in the bilge, a major cause of boat explosions with heavier than air gases like propane or gasoline. However, it has almost disappeared from the scene because it is simply not available.
That said, a few boats do come with Origo stoves. Mainly because it's a weight
saving device. I used an Origo stove on a carbon fiber racing trimaran on a trip once. I found it worked quite well. It's system is like a caterer's steam table that uses sterno cans except that the Origo cans are larger and they have wadding inside (like an old Zippo lighter) to hold the alcohol. You remove the can from the stove for filling. The cans on the stove I used would hold a quart or so of stove alcohol. It is not pressurized in any way.
As far as performance, yes it took 10 minutes or so to boil a quart of water that a propane stove would boil in 8 minutes ... big deal. The smell of the exhaust would make me heave breakfast though. It's really sickening. I would say that you'd better use it in a well ventilated area which may not be compatible with winter activities. It is also hard to see if they're lit. The old invisible flame trick. Some alcohol stove fuels have additives to make the flame more visible but I don't have any experience with them.
I can't say how well they would work in cold weather either as my experience is all in Florida.
All things considered, boaters have adopted propane as the cooking fuel of choice. It can be made safe enough, it cooks well, it's cheap, and it's readily available almost every where. I have two 6lb bottles on my boat and they will last 6 or 7 weeks (each) of daily use. The main issue with propane is the carbon monoxide exhaust ... do not use one to warm the camper.
On my camper however, we use a portable camp stove (a Brinkman stainless steel model from Walmart) and the small green camp gas bottles which we use outside. Of course, we don't live in our camper for more than a couple of weeks at a time. If I was full-timing, I might rethink that.
When we're plugged in, the wife uses the microwave
and a George Forman grill if we don't use the gas grill or the portable stove. I would also think that a large electric frying pan or one of those convertible electric griddles might work well too. Our gas grill is a Thermos model that has a cook top like a George Forman grill. It's much easier to clean than a standard gas grill. We like it a lot.
Lots of options...