Spreadsheets are the most successful business software ever made — and they'll take you surprisingly far. But there's a point where the workarounds cost more than a proper tool would. Here's how to tell you've reached it.
1. Nobody's sure which version is correct
When “final_v3_USE_THIS.xlsx” exists, you've lost a single source of truth. Multiple copies mean conflicting numbers and decisions made on stale data.
2. Permissions are all-or-nothing
Spreadsheets struggle with “this person can see these rows but not those”. If you're maintaining separate sheets per person to control access, you're hand-rolling a permissions system badly.
3. Manual steps are causing real errors
Copy-paste between sheets, manual status updates, and re-keying data are where mistakes creep in — and they get more expensive as volume grows.
4. You can't see the state of the work
If leadership has to ask someone to “check the sheet” to know where things stand, you need a system that reports state automatically.
5. Onboarding takes a tribal-knowledge tour
When a new hire needs a 30-minute walkthrough of which tab does what and which cells not to touch, the spreadsheet has become an undocumented app.
The short version
Key takeaways
Version confusion and per-person sheets signal you've outgrown spreadsheets.
Row-level permissions and reporting are hard to fake in a spreadsheet.
Move to a proper data source first, then build a thin app on top.
Migrate in batches with backups and validation — never a big-bang cutover.
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