indeed, the underhand tricks that Intel played in the past might have been a factor but given their current condition and with AMD now having attractive processor options, this situation may be changing sooner rather than later.
and it seems to be finally happening. according to this blog post on Dell's site: https://www.dell.com/en-us/blog/dell-transforms-ai-pc-portfolio-for-anywhere-productivity/ the Pro Max series will feature both Ryzen and Threadripper processors, though it isn't clear whether this applies to the mobile workstations.