As someone who took a break from Destiny 2 during Seasons of the Worthy, Arrivals and the Hunt, I would really like an opportunity to unlock Cosmetics such as the Siegebreak and Steeplechase ornaments and the Carminica Shader. Ada is the perfect tower vendor to facilitate access to legacy cosmetics that I arbitrarily cannot aquire now because I wasn't playing the game during any given season. The completionist in me is dying of FOMO blues for these items and this is an intuitive solution that aligns with Bungie's stated goal of reducing the "you-had-to-be-there" aspects of the game.