We'll continue to keep GSX updated and its code and features in synch as much as possible with the MSFS version.
We'll release updated installers for P3D V6 in the next days. All updates will be free.
We are not planning to either update past sceneries that might have visual issues (this only matters for the older sceneries and some of these issues were already present in V5) or developing new products for P3D V6.
So, basically, no major issues to continue to use what you have, but no new products, and the only product that will be continued to be updated with new features, will be GSX.