Any shader you have unlocked currently, will be a permanent shaders you can use an infinite(based on glimmer supply) amount of times to color your armor, starting next season. No more need to go to collections to pull out a stack of 5 of them to use on your armor After that, any other shader in collections still locked will need to be found (if they drop in the world) or the eververse ones will need to be purchased for an increased amount of bright dust starting next season No shaders will be given freely, they are simply getting rid of the inventory page for shaders so delete them now and get back some currency to prep for next season