On: Freeform: a new app designed for creative collabor...

[_Algernon_]

It sounds like you need to export instead. CSV export isn't under save because it doesn't retain all the details of the document (such as formatting). This behaviour is standard and can be seen in MS Excel, LibreOffice, etc. as well.

[ceejayoz → _Algernon_]

> CSV export isn't under save because it doesn't retain all the details of the document (such as formatting). This behaviour is standard and can be seen in MS Excel, LibreOffice, etc. as well.

Office warns me my changes will be lost and offers to change to XLSX. Numbers just changes it silently, without warning.

[brazzledazzle → ceejayoz]

And I thought the Excel UX for this was annoying. Silently saving another copy of the file is terrible.

[irskep → _Algernon_]

LibreOffice will happily re-save CSV in place. That's the only reason I have it installed! But Excel does require the same workflow as Numbers.

[Technetium → _Algernon_]

If you are concerned about retaining formatting in comma separated values, you have MUCH bigger prerequisite problems to figure out.