[NTG-context] body text and footnote space

Dear list, I note previous discussions on the matter of body text invading footnote space (as late as last year). As I am currently typesetting a 400 plus page academic text with hundreds of footnotes, and do not have the option of making them endnotes, I am facing this issue page after page. The only solution I have for now is to make per page layout adjustments to reduce a line or two, so there is a way to handle it, but given ConTeXt's 'perfection' generally, I would be very interested to know if there is any other solution forthcoming. I've tried various options in \setupfootnotes and \setuptolerance', but to no avail. Julian