Why your old Excel spreadsheet is “legacy code” (and how to fix it) Applications Microsoft Microsoft 365 Microsoft 365 Personal Microsoft Excel Microsoft Office 2024 Technology Why your old Excel spreadsheet is “legacy code” (and how to fix it) Tony Phillips March 29, 2026 Transform legacy spreadsheets into maintainable, automated tools that scale and survive the test of time. Read More Read more about Why your old Excel spreadsheet is “legacy code” (and how to fix it)