Canister stoves would be a clear first choice for me, if not for these three factors:

(1) I can afford them; but the cost adds up over time, and I don't like to waste money. Every time I buy a few canisters, I feel like I am wasting money. They are 'only' about five bucks per can (at REI, more at small stops along the way...). A gallon's worth will run about a hundred sixty bucks.

A gallon of gasoline currently costs about 3.49 USD where I am.

So the canister fuel is over forty-five times the price.

Adjusting for a roughly 5% greater energy density (it's probably less), doesn't help the picture much.

Nor does buying larger canisters -- gasoline is still many times less expensive.

I go through gallons of fuel. Having a few hundred extra bucks in my pocket means something, and this will repeat over time.

No, it wouldn't be a huge financial burden to spring for the canisters; but that is not really the point -- the point is, I would rather have the money than the canisters.

(2) Canister availability is a real issue on many of my tours. When I can get them, they are often considerably more expensive than REI. I don't care at all for the strategy of mailing them to myself.

(3) I don't particularly like the canister idea. It's added clutter; partially used canisters aren't so great to have to deal with; and the whole approach goes against the re-use ethos.