Google has killed off their Google Map Maker product and has told people the features have "graduated" to the Google Maps app. Google said "Google Map Maker features will officially graduate and be integrated directly into Google Maps in March 2017 when we’ll retire the standalone Map Maker product."
Google said that "starting today, edits made on Google Maps will no longer be available for moderation on Map Maker."
But not all the features have been migrated and added to Google Maps. A WebmasterWorld thread has one member saying "only some parts of the functionality of Map Maker are currently available in Maps and it is to be seen how much of the core functionality will be transferred in the coming months." One feature gone is the history of the changes.
I guess time will tell but Map Maker has been a target for Google Maps spammers and maybe this will be a good thing? It is unclear at this point, so time will tell.
Are you upset Google Map Maker is gone?