Meanwhile, you might like to check out the update on the Map Improvements 2018 project page: Special Update on Map Internationalization. It includes a lot of information on the feature status, how it will work, how we imagine it might be useful, what the known limitations are, etc. We’re looking forward to getting your input on this challenging but important feature; the best place to leave your ideas and questions is on the project talk page.
We told the English Wikipedia community to expect release of the mapframe feature, which creates embedded maps on a wiki page, by the end of the April. As of this writing, we are expecting release on Monday, April 30th.
The team announced that we plan to to release mapframe to most Wikipedias that currently lack the feature. A lot of the tasks we've been working on for the maps project relate to our goal of making maps technology more stable and maintainable.
Nine Wikipedias won't get mapframe at this time. These are wikis that use the strict version of Flagged Revisions, which is not compatible with mapframe.
Two display bugs from the Kartographer Improvements Community Wishlist proposal have been fixed: show "hand" mouse icon on unclickable objects and reduce the clickable area around icons added to a map. 
As map internationalization moves closer to release, we're seeing and addressing a number limitations to the feature, mostly having to do with the variability of multilingual label data in OpenStreetMap, the open-source mapping project that powers our maps. As one might expect, the number of labels that are available for which languages varies from location to location and language to language. We've also seen issues related to inconsistency in labeling. We're working on strategies to mitigate the impacts of these inconsistencies. E.g., we've a new parameter for mapframe: lang="xx" (where xx would be the language code). This will enable users to specify the language in which they want a given map to display, or, using the value lang="local", to revert to a non-internationalized map, should that be more advantageous for a particular place and language. Read more about it on the Map Improvements 2018 page, under Updates.
Numbered external link were not showing properly in Structured Discussion diffs. This has been fixed. 
More styling options will be added to Structured discussions' toolbar.