Trangia is a brilliant piece of kit if weight Isn't an issue. The stove is self contained it has pans and even a kettle and doesn't weigh too much. It isn't very fuel efficient and you need to take a fair amount if you're out for a few days.
There is a gas conversion kit which reduces weight considerably but then it wouldn't be a meths stove.
Like for like, the Trangia is one of the lightest stoves on the market !
What I think people confuse is the Trangia is a cooking system, not just a burner, but you don't need to take all the kit every time.
I have a Trangia and also a MSR Pocket Rocket gas stove, which at 87gm for the burner unit is slightly lighter than the 118gm of the Trangia meths burner unit, however even the smallest gas cylinder is 200gm (150gm of gas and 50gm of bottle) whereas the fully loaded meths bottle is 300gm of meths and 95gm of bottle, obviously it does not need to be fully loaded.
So if you compare say one hour of burn time, then the Trangia comes out slightly lighter.
So no matter how light the actual burner you have to add the weight of the fuel, the bottle the fuel comes in, and how many hours the stove will run of the fuel and the BTU produced in that time (ie How long to boil a litre of water at room temperature)
You then need to include all the optional items;
The wind-shield, the pots and pans, the grippers and stirrers, the mug, the kettle, the chopping board, the cutlery, the kitchen sink etc.
Hence in over 20 years of multi-country and multi continental expeditions backpacking on foot, panniers on bikes and in barrels in canoes we have taken Trangia's
I only use the MSR as a hill walking backup, as burner & bottle fit inside a titanium mug with some emergency supplies to I can knock up a hot drink to ward off hypothermia whilst on the mountain.
By the way, the Trangia Gas burner is 180gm, so about 90gm heavier than the MSR pocket rocket, so the difference is about the weight of your watch.