They didn't actually lie. Game development is a constantly moving thing and as times move forward so must the Devs adapt and as destiny 2 is older and let's face it at a crossroads where it will continue for 5 plus more years or fall of in population and get abandoned the Devs must reconsider and the sunsetting getting reversed is very clearly a bi product of them trying to make high end content more accessible. But yet it still stings a bit even though a lot of sunset guns have been powercrept or have plenty of equals now. Just enjoy the game as it won't be around forever