Alcohol stoves are very appealing as a light and simple piece of gear and I know they have many fans. But with BTU output at around half that of a butane or white gas stove I just never could justify taking one on a trip of any length. Butane canisters are readily available as is white gas, and many gas stoves (my favorite is the MSR Whisperlite Internationale) also burn unleaded auto fuel which is super available. Gas stoves lose out on the weight and simplicity factor, and cartridge stoves leave you with canisters to dispose of that never seem to get entirely empty, but they are good options for half the cooking time and half the fuel weight that you'll pack along.I find the btu output, while less to be just fine. When cooking for a group I prefer the extra output of butane. Also if backpacking and melting snow for water extra output is nice.
And with all that, I do appreciate that sticking with what you know and are used to is of value as well.
I have found butane canisters less available than alcohol and have sometimes gone considerable distances without seeing any for sale. White gas is almost never available in small quantities. Often there are only gallons and if you are lucky quarts. On a bike tour I'd rather not carry that much since you can restock more frequently to keep the load light. The 12 ounce Yellow Heet bottles are just about right for me.
Butane and white gas both have higher btu per weight than alcohol, but that doesn't offset the extra weight of the stove unless you are carrying fuel for longer distances between restocking points.
BTW, Probably the most widely available fuel is gasoline. It is very energy dense and can be either cheap or free if you just get the little bits of gas that comes out of the hose when the pumps are not turned on. It does stink if you spill any on your gear or clothing and require a similar stove to a white gas stove.
For me the alcohol stove wins out on most tour where I am cooking for one and butane for group tours (for two people I consider it a tossup) or long backpacking trips.
BTW, my go to alcohol stove is a sub half ounce pop can burner. With pot stand and wind screen it is still under an ounce.