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Thanks for a good word! Founder of HyperFormula here. HF will go AGPL soon, too

• nathanstitt 4mo ago
  HyperFormula was the key to unlocking the entire spreadsheet, the technical foundation of sparse rendering and multi-user interactions were easy enough with Yjs and and a few other libs, but I was completely stuck on how to support formulas beyond simple SUM and such until I found it.