Support.  If you consider only two large cities, it would be hard to determine that a primary use exists.  Add in all of the other uses and clearly there is can not be a primary use.  Clearly being the home to Harvard University and the Massachusetts Institute of Technology makes the Massachusetts city eligible for at least equal importance with the UK city.  To imply that the US city does not have world wide recognition is a rather poor argument.  The main argument voice seems to be that this is the oldest.  Well, that does not equate to being the primary use.  We should do the least harm when sending readers to a specific page.  The current setup directs too many readers to the wrong page forcing them to go to the dab page to find out where they should have been directed.  Moving the dab page is the only sensible option.  I think the root problem here is that too many editors think that by not having their article at the main name space is a bad thing.  Dab pages are actually a good thing and should be used more.