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Can I ask why? What is the harm in saving users work unexpectedly especially when I see a version history here?

I have been working with computers for 30 years, and I would find lack of a timed autosave surprising. Autosave was common on desktop applications in the mid 1990s. See: Everything in the MS Office suite.

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The simple reason is that MapHub doesn't have a Google Docs like "time-traveling" version control nor Undo implemented. Undo is _really_ complicated if you don't start your app with that in mind. So the way to work is Save, try something and if you want to revert then you just reload the page.

Of course there is the "Previous versions" feature, but it still breaks my logic of Checkpoint-Experiment-Revert cycle. But I might be alone in this and users would be happier with autosave.

Update, answered in detail here: https://news.ycombinator.com/item?id=42016231

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