Not getting to experience old raids is not the fault, nor problem of Bungie. If I had a chance to date the hot girl from Econ 101, but I didn't ask her out until the Captain of the Football Team did, I have no one else to blame but me. Destiny has already infested the game with casuals and Free to Play New Light $%#@$#@'s who ruin the experience by not making Public Events Heroic...but I digress...I'm sure they'll unvault some old raids one by one, and get rid of others, but ultimately, it's about a lack of space. You can't grow Destiny infinitely - the game already takes an exorbitant amount of memory.