Apple has abruptly updated its current iMac Pro sales page to reflect the fact that apparently only its base model is in stock. This has led to speculation that a new version of this PC, perhaps even with an in-house chipset instead of the last remaining unit's 10-core Intel Xeon W-series processor, is on the way. However, the OEM might be wrapping its product cycle up for some other reason.
https://www.notebookcheck.net/Apple-discontinues-the-Intel-powered-iMac-Pro-reviving-rumors-of-an-upcoming-new-version-with-a-different-platform.526550.0.html
Either Apple is ready with its Pro level silicon or its AMD with apple support for thunderbolt, either would be great.