I use tabs a lot too, and I was thinking that we could take advantage of them to load assets (scripts, field images etc) in a smarter way. For example, when the post edit screen opens, it would only load the js and images of the fields that exist under the first tab. If the other tabs contain fields with extra scripts and images (for example Google Maps), then it would load them only when you click on the specific tabs.
If the same could be done with db queries it would be perfect, but I imagine that this would be tricky. Scripts and images, on the other hand, sounds more feasible.
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