Such news was inevitable, really. Google Maps on Android has been through so many updates and there must have been significant server-side changes too - in fact, it's a miracle that Google Maps has kept working as long as it has.
Until this week, Google Maps v4.1.1 from 2010 was still working 'fine' on Symbian (albeit without Symbian^3 niceties like multi-touch zoom), but I and others have noticed failures in address look ups. Here are some screens and comments:
Left, what should happen for any supported country (I tried the USA, France and the UK) when you tap and hold on any road on the map - there should be a summary thumbnail and then tap on this to see the screen shown here, with full details. Including the unique StreetView.
Right, what happens now. Long-tapping on the map gives just a thumbnail from a generic spot vaguely nearby (as shown also below), followed by this error message.
Let's try that again with a different spot, in a different country. Long tapping a road brings up a generic thumbnail for my area rather than this specific road/address. And again (right), tapping the thumbnail gives the error message.
Update: the disconnect is definitely at the search/discovery end rather than a fundamental incompatibility with the StreetView servers. If you search for an address by name and then tap on the pop-up, the full pane, with StreetView does still appear - and work. Curious!
Of course, one might well ask whether lack of Google Maps is a showstopper for Symbian users - probably not, given the excellence of Nokia Maps and the continued improvement in Nokia's online places of interest catalogue and regular road map updates.
However, Nokia doesn't yet have a phone-side StreetView clone - and if one appears then it's highly likely to be on Windows Phone only. Making this inevitable break in Google Maps compatibility for Symbian a little sad. Comments welcome.