Well, I've got a couple of petrol stoves, the superb optimus nova and equally superb optimus 111c, I've also got the trangia converter for the nova, which again is super. Obviously I also have the alcohol stove to go with the trangia - actually I've got abou half a dozen of em. But I've just ordered a "jetboil".
Philisitne I hear you shout.
Well, they all have their place. As others have said above, they pick the stove that is best suited to what they are planning on doing. The optimus 111c is a superb base camp stove or a car camp stove, super-solid, reiable and powerful. The nova is the backpack equivalent for serious cooking on extended camps. The trangia is great too. It's super simple and ultra-reliable and gets thrown in the sack for any casual jaunt. But there is a place for gas too - or at least the jetboil. I bought it because all the other stoves I have are fiddly, or slow or smelly or any combination. Gas is quick, powerful and clean. I plan to keep the jetboil in the back of me landy for those "fancy a quick brew" moments. It only takes 90 seconds to boil, is very stable (you can boil up while holding the cup because it all screws together), I can use it inside the landy without worrying about priming, or smelly fumes. It's also a good, compact day-trip brewing machine. Just throw it into a side pocket and you're good to go. It wouldn't be my first choice "do it all" stove, it's too limited for that, but it has it's place. I dont think it is fair to write off any one particular stove/fuel setup in the search for the holy grail. They all have merits ...and shortfalls. The jetboil isnt even a little tiny bit bushcraft, but so what? It does what it says on the tin.