The legacy engrams were pointless from the get go. The legacy engrams provide absolutely no use and they're a complete waste. I would much rather xur sell an engram like he did in Y1 that had a chance to give useful equipment.
Edit for those who aren't bright: Why do you "need" legacy engrams? They serve no purpose other than collection. They aren't viable weapons for things that require higher light level. Your argument is missing points.
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Are you stupid? If you get a legacy exotic you can buy the current, relevant, year version off the kiosk.