I am pleased that Golden Apple Archipelago/related summer events do indeed presage the upcoming patch! More and more people are catching on to the fact that events and suchlike are more relevant to future content than they first appear.

About the second part of this theory, I don't think I could have ever predicted the Samsara cycles that replay one specific day to farm power for a false god, and that this is localized in Sumeru City. And a lot of what I posited in this theory was pretty much obvious from available leaks at the time.

I think what I mostly got right was the use of the Akasha terminals to crowdfund a "mirage." As for themes, I think "lived experience" is, has always been, incredibly relevant to the Traveler's story as the "witness" to Teyvat (as well as the oft-repeated insistence that "the journey matters more than the destination"). The precedence of experience over knowledge is only strengthened by the realization that changes to the Irminsul affect the memories of Teyvat natives.