>"now you know why I have never used a canister stove. The expense, waste and disposal of old canisters is a drag."
I felt that way for a decade until I took the plunge. It wasn't the recycling issues of steel that swayed my (white gas comes in steel cans, too. And steel is pretty cheap (low energy costs) to refine). It was the relatively high cost per gallon / cost per BTU that galled me.
Instant on, instant off, no fuel wasted for priming, no eye-brow-singing flare ups, and that I can let my 9-year-old use it, instead of waiting a few more years to teach her white-gas use all swayed me once I tried a canister stove. Now I have a fleet of them to rival my SVEA, Optimus, and numerous MSRs.