Has this been resolved or improved at all since your post in April? I have recently ordered a Dell XPS 15 9500 (it was $600 off)
i9-10885H @ up to 5.3 GHz, 8 cores, 16MB Cache
64GB (2x32GB, DDR4, 2933MHz)
1 TB SSD
Nvidia GTX 1650 Ti 4GB GDDR6
I'm hoping Lightroom and Photoshop runs blazingly fast if not I will return it right away and instead maybe order a Macbook Pro 13 M1. I have never owned an Apple product in my life.. but it seems to run Lightroom and especially Lightroom CC really well despite not being optimized yet for M1.