Why Print presets in points not mm?
Every time i do new document from preset, i am thinking why is it in points not mm or inch. It is PRINT, not screen.
Actually a point (which is a a fraction of an inch) is a typographic measure, which is more related to printing, than for a screen use. The way Ai teats it as an equivalent to a pixel is a historical tradition, and it costs it a lot these days, when resolutions differ from those we had when these got linked.
But oh boy I understand your frustration.
But for me units stick too millimeters correctly when changed, and all presets in the Print section of this modern New Document dialog are displayed with 'mm'... Can you recheck if they do for you now?