@CommanderCat_ We ask players not to cheat. That is the same thing we ask of those using litematica. In the same way pieray is banned, abuse of litematica is too. Caseys video was misleading in terms of the high render distance and saying it can be done from anywhere. You cannot just set the coords and get a world download and search for chests. Every chunk has to be manually loaded. Which for those that seek to do you harm would just use an actual cheat client. For those that are worried people will be scouring the world analyzing for bases the steps necessary are so much more difficult than xray or even just using pieray as that updates automatically as chunks get loaded and de-loaded. Mass elytra chunk searching would not only require you to go M>area editor>analyze area>search for your query. Rinse and repeat. There are no keybind shortcuts, and the query does not save. The cache would have to be repeatedly cleansed as well. The amount of keystrokes required to make it work is just not worth any cheaters time. If it looks like x-ray you get banned for x-ray. Whether its pieray abuse, litematica abuse, a bobby render bug, etc. Cheaters that join the server will most likely get banned long before they start running around .wild saving schematics. And on that note, maybe you have a NASA supercomputer to load giant schematics but I certainly don't. The same rules to hide your base from pieray abuse still apply. As far as avoiding letting vines, kelp, bamboo, etc grow too long, etc etc etc. Safest place to store your loot is and always will be an enderchest or a billion miles out in the nether.
The issue is you don't have to scan every chunk, you just fly until you see player evidence (enderman placed blocks, lava/waterfalls loaded, grass eaten, full grown vegetation, looted structures, portals, creeper craters, items on the ground, oceans where sand/gravel isn't falling, broken kelp that's already at the water's surface, etc etc etc) which is first page, basehunting 101. Whatever someone may use comes AFTER this task, otherwise you're wasting your time. This significantly narrows things down, and with enough of it you can encircle where a base may be.
To add, even just the distribution of villagers or animals away from their spawn origin is evidence.