Think about it this way:

Good torch: $1500+



Good sawzall: $150+

A torch is a lot more expensive and would only be worth it if you were cutting big metal or mass amounts of it. For a scrapper who takes in pickup bed full of metal every once in a while, it would be a lot of pickup trips just to pay for that. On the other hand 1 trip could pay for the sawzall.

If you are doing big jobs such as patriots power plant project scaled Down 100 times, I would say a torch is worth it. Good luck