The best answer to my yesterday's question https://digipres.club/@raffaele/113860006500966105 was Publii https://getpublii.com/
It uses its own data format (static files + SQLite, which is good), but is not Hugo or any of the well-known SSGs, so I am still evaluating it. But, I mean, is a good tool, that I would recommend to anyone who wants to build a website today.
I also had a dejavu: Citydesk for Windows, ~2001, by Joel Spolsky
https://www.joelonsoftware.com/2001/10/12/what-does-citydesk-do/
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