So a lot of devs that have spoken publicly are lying and we are supposed to believe in the ones that are annonymous?
Anonymous people do tend to be more honest, I don't think it's unbelievable to suggest that a developer which has a marketing partnership with Xbox isn't exactly going to say negative things about their tools.
The stuff I posted here: https://gamrconnect.vgchartz.com/post.php?id=9247175 are from official documents straight from Microsoft which shows the SDK is coming in hot.
With the next generation of the Xbox console, Microsoft is working on a new development environment called Game Core. The environment is now available to developers building titles for the series X and series S (Lockhart) but it’s not quite finished yet and won’t be finished before the release of the upcoming consoles.
The purpose of Game Core is two-fold, to make it easier to develop games for the two SKUs of series X/S and it is designed to make game development closer to that of building a traditional Windows 10 application.
This doesn’t mean that there will not be more updates arriving to the GDK before release, but it does mean that the June 2020 GDK will be the baseline for developing next-generation titles.
Considering Game Core is all new, not everything will be ready for the launch of the consoles. While developers can now use the June 2020 release for games that will head to retail, features like “Multi-process games in Game Core” will not arrive until after launch. There is a work-around for this in the current release, so fret not that this means games can’t be multi-threaded.
The takeaway here is that Microsoft’s Game Core is moving full-steam ahead and will be ready for launch later this year. But it’s not complete and there are quite a few bugs/optimization that need to be worked out before all the functionality meets the targeted spec sheet when the project was first started.