[tracker1]

My own experiments/experience shows that recrawls happen about 1/3 as often and tend to lag a few days behind for JS content vs inlined/delivered content. It's helped a little by dynamically delivering the sitemap data, but even that only speeds things up a little.

My guess is they're putting about 1/10th the effort into keeping things freshly indexed for JS, but may well be devoting 2x the resources vs directly received content.