To prevent empty pages in a double-sided page environment, I have been using
\setuppagenumbering[page=].

This does not work as it should, however, when there is no body text but
only a continuing footnote on the last page. Then, though there are still
no empty pages, the pagenumber on the last page is the same as that on the
preceding page.

Consider
\setuppagenumbering[alternative=doublesided]
\setuppagenumbering[page=]

\starttext
\dorecurse{3}{\input knuth}\footnote{\dorecurse{3}{\input knuth}}
%\input knuth
\stoptext

with and without the line currently commented out.

Any suggestions will be greatly appreciated.

Alan