This stuff was NEVER advertised to carry over. Neither was everything else you put so much "work" in.
If you want your old gear to remain useful way later in the game, then go play World Of Warcraft where Transmogrification is a thing.
Destiny Is a videogame. It is a luxury. You will survive without your silly emotes, fancy sparrows and the other crap you bought.
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I understand the fuss over it. Which isn't to say I agree. The sad thing is that they did it to themselves. They've taken a game should have been about the experience and playing with friends and made it all about the loot. It's your own selfishness and greed that makes you complain, not anything that bungie has done.