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Re:An oral history of Bank Python by barrkel on Thursday November 04, 2021 @06:16PM (#29113156)
It's as old as VisiCalc, it's how spreadsheets work.

I built a similarly reactive system for web UI binding back in 2004, running binding expressions on the back end with cached UI state to compute the minimal update to return to the front end, in the form of attributes to set on named elements.

Re:An oral history of Bank Python by AmericanBlarney on Friday November 05, 2021 @03:25AM (#29116319)
Yes, although doing it in distributed fashion at the scale of SecDB or Athena introduces quite a few more complexities.