That is much more than just we won't be offering the apps anymore as it sounds like the HERE apps will break after this date (give or take). In fact, some users are already reporting the apps not working (or working intermittently) on the Fast Ring Insider builds for Windows 10 Mobile (Redstone releases e.g. build 14283 or higher).

In the HERE blog post the company specifically notes that the apps themselves will "no longer work on devices running Windows 10 mobile after June 30, 2016."

There is some confusion, however, about what this all means for Windows 10 Mobile users. Here is a quick hit list of things to keep in mind as well as some questions we have about these coming changes.

This morning HERE dropped some rather big news on the Windows Phone community by announcing that their Windows Phone 7 era apps will no longer work on Windows 10 Mobile devices past June 30, 2016. As a result, they are removing the apps from the Store to prevent confusion after that date.

This means that Microsoft's native Maps app for Windows 10 and Windows 10 Mobile will still use HERE data just as it does today and this evidently not changing.

@deanleigh thanks for appreciating our WP apps; Microsoft will continue to be one of our most important customers ^P

The real crux of all of this is that Microsoft and HERE are not going their separate ways. Far from it. The HERE Twitter account responded to an inquiry directly about that noting that Microsoft is still a big customer:

Currently, we do not know the reason, but it could be some, none, or all of those listed above.

Good question. In fact, this is the primary issue that none of us currently know the answer to. Is there an API licensing issue that is timed to expire on that date? Did Microsoft and HERE have a contract of support for the apps that is coming to end on June 30? Is there something in Windows 10 Redstone that irrevocably breaks the old app?

Many fans of HERE Maps – and perhaps more importantly HERE Transit – are wondering why this is happening. Besides the reasons above, it does seem like Microsoft made a decision some time ago to discontinue having two apps for navigation.

In other words, if Microsoft is building their own Maps app that uses – and still uses – HERE data, why have a separate app that basically does the same thing but is old and doesn't leverage Windows 10 and its new APIs? Just put it all into one, kick ass app and call it a day.

Of course, you are likely to quip that Maps for Windows 10 and Mobile is a far cry from what HERE Drive, Maps, and Transit can do for you today. For some users, that is most certainly true. In the U.S., I would argue it is not. Regardless, there will be a hole left for many users who prefer HERE over the Windows 10 Maps app, and that is a legitimate problem.

WinBeta's Zac Bowden dropped a hint that some big changes are coming to Windows 10 Maps real soon. Although we do not know the details of these features, the timing suggests a Build/Redstone/summer release. We are likely to learn more in just about two weeks at Build.

The loss of HERE Maps is nothing to be upset about, I know of a couple awesome improvements coming to the Win10 Maps app soon :) — Zac Bowden (@ZacB_) March 15, 2016

Microsoft's real plan may be to deprecate the HERE apps right as they ramp up their own Windows 10 Maps offering with the Windows 10 Redstone release. That is speculation at this time, but not far-fetched either. Clearly, Windows 10 Maps is not a finished product as literally nothing about Windows 10 and Mobile is ever "finished".

The big risk here for Microsoft is whether these alleged changes will be enough to offset HERE especially in Europe where the nav company actually has some clout. That part remains to be seen.

One thing seems clear at this time, however. None of this is a surprise to Microsoft or HERE. These changes appear to be all planned long ago. This change does not look like a sudden "business decision" to abandon the platform but rather a deliberate strategy.

Hopefully, by June 30 it will all make much more sense.

As far as HERE the company seems to be angling for more map licensing and in-car ventures rather than consumer app products. While HERE remains - for now - on iOS and Android those platforms benefit from the juggernaut that is Google Maps. It is not obvious that HERE will continue to develop such apps in the face of a such a challenge nor is it clear if consumers even care about the product.