In someways the problem here is the inverse one might expect. Without photography, the entire modern world does not exist - it's the base technology required to develop optical lithography, without which we never achieve silicon chips. Without the spreadsheet (VisiCalc), the IBM PC likely fails to find product-market fit, and the entire tech and financial worlds are a decade or more behind where they are today. These are technologies with downstream tech trees so deep we can't reasonably put an upper bound on their value.
I don't personally believe that note-taking represents a paradigm change in the same sense - obsidian and friends are really just reifying existing text-based (and even paper-based) note taking workflows, with some hypertext niceties layered in...