Feedback on the proposal to change U+FFFD generation when decoding ill-formed UTF-8

[Hans Åberg via Unicode]

> On 15 May 2017, at 12:21, Henri Sivonen via Unicode <unicode at unicode.org> wrote:
...
> I think Unicode should not adopt the proposed change.

It would be useful, for use with filesystems, to have Unicode codepoint markers that indicate how UTF-8, including non-valid sequences, is translated into UTF-32 in a way that the original octet sequence can be restored.