It's why only nerds use Linux (simple for the developer) but everyone uses Office (simple for the user).
Sorry, I meant Microsoft Copilot 365.
Which traces back to Xerox Bravo text editor.
From the authors, Charles Simonyi went to Microsoft as one of the original Word implementers, while Excel was born on Mac OS and only later ported to Windows.
I think Excel is a good example that everyone can build a clear mental model on how to use it, but implementing one is a daunting task.