Letting players tag chunks, we'd be able to keep track of which chunks are old vs new.
So why is this important?
The biggest benefit is that datapack creators will be able to easily add in many new spawning structures!
Whilst this is technically already possible, it either requires the bottem bedrock layer to be filled (as a way of tracking weather chunks are new or not) or for many entities to be place.
Both of these methods cause lag and more importantly will cause issues when you start combining datapacks together.
With this implemented, all you'll have to do is download a datapack into your datapacks folder, and new structures will spawn in your world!
How does it work?
In a similar way to how you can assign each chunk to be force loaded, chunks can each be given a tag, through something like:
"/chunktag x z add/query tag"
Through this, you can then check weather a tag has been added to a chunk or not through
"/execute store sucess...."
or using entity parameters
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