I like this idea, I wrote a tiny CRM-like thing for my mom a month or so ago (upgrade from a google sheet that I had previously upgraded from an Apple Note) and it uses Sheets as it's backend. She can always go back to the Sheet and lose nothing but the web interface she uses it tailored to exactly what she needs. I couldn't be happier with it and she loves it.

I'll have to remember this for my next little one-off tool.