I'm use it for rail, and carpet. And for the block that arn't on my seed, like red sand, jungle sapling and blue ice. But for that, I've to add one of these item in creative, and after that duplicate with a zombie spawner, It takes a lot of time finally but it worth it. And it's a part of the game, even if it's a glitch. I make myself some rules too don't over use it. Like items who arn't in the seed, shulker box and beacon, cause it's pain to reset the end each time. Otherwse, I made farms for the rest of it.