Also, regarding "what might be left behind and how could it be put to good use": what will be left are megatons of storage space and huge computation power we do not need in the first place, for which future forms of digital capitalism will probably --unfortunately-- find use for, sustaining the ongoing ecological devastation. So the sooner we burst that bubble (and capitalism), the better. And as for a "good" alternative usage of those resources, dunno. Not sure there's one to be found...