Yah, I did that a couple times, then I made a duper with a zombie spawner and the end portal. I reset the end seven times and got five stacks of shulker shells, and turned those into several shulker boxes of shells. I knew from the beginning I wanted to use them on an industrial scale. Its cheaty as hell, but I only use the duper for shulker shells, sand, gravel and dragon eggs. Makes our classic size maps a little more viable in the long term (my survival world is a couple years old). I destroyed all the desert I'm willing to dig up on my map, I bought glass for the longest time, but finally I gave in and started duping it.
I actually made a suggestion for there to a time stamp on the world selection for console to show old these worlds are. But basically as it is now the most recently saved map comes up top. So far I don't know if they seen it or consider it.