> I think an expressed preference of actual SRFI authors to keep the full
> license comments as they are is a more than sufficient reason to do so.

+1

> In my last email I wrote that it has the advantage that
> readers don't have to determine if the text is exactly the standard
> text, but it also has the disadvantage that copiers must be sure to also
> copy the separate file for the license.

To change the license text to a standard wording, it'd be best to get
confirmation from each author.

I grant permission to change my SRFIs to any common variant of MIT.

Before contacting authors, it'd be best to gather a list of all pending
chores and ask about all of them at the same time.

For the license boilerplate in SRFI documents, a compromise would be to
keep it in small print.

> So, "add SPDX metadata, but do not remove anything" seems like the
> safest course of action.

+1