Well that's a huge bummer if they completely removed Turbo Max 3.0 (TBM3) altogether — just to "solve" the less than smooth process of turning it off in the BIOS for the GPU limited folks....
My CAD workloads are by far single thread throttled... I only use the RTX A5000 for it's 16GB of VRAM... If they did that'll slow my render times by 10-15%...
Sounds like Dell though to go for the lowest common denominator. I didn't pick up the Precision Tower 3660/13900K as they just throttled the heck out of it to avoid customer complaints about noise/heat.