It’s a neat idea for sure, but the out of place artifacts are rarely/never as mysterious as people like Graham Hancock would suggest.

Younger Dryas wasn’t as catastrophic either. Nor are flood myths as unified.

It’s fun to imagine possibilities like that but I can’t conceive of how a society could advance to a nonphysical/digital technology paradigm without impacting the earth in enormously detectable ways.

I think it’s interesting to imagine a scenario like what if European explorers shipwrecked on a place like Rapa Nui, the most isolated inhabitable place on the planet. How many generations could they maintain knowledge of the globe, and their culture.