[michaelmior]

> no revision control

I'm not claiming this is a sufficient solution, but Google Sheets does keep a version history and you can see changes. Doesn't solve the problem of working copies and merging though.

[fendy3002]

Try to compare version histories on hundred thousands row of google sheet. It's not a pleasant experience.

[michaelmior]

Absolutely. I'm just mentioning it because sometimes I forget that it even exists and it is better than nothing at all.