50% off new XTR front mech at Merlin

Price seems good, but out of curiosity - why are front mechs so heavy nowadays? The M950 XTR mechs were 110-115g (mine is 107g, tuned) and even the basic Deore/LX/XT (M510/570/760 etc) were all 125-130g. This new XTR one is 148g according to the mfr spec!
 
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