The iMac Pro is still a good value compared to the Mac Pro base model even in its current form
Yes, but so is a platinum-coated bucket of Lady Gaga's bathwater signed by Banksy. Even the reviewers saying nice things about the better Mac Pro configurations criticised the price/performance of the base config. To be fair, the MP base is only there to create a low (?) headline price, or maybe for some niche that needs lots of i/o but only a weedy (by workstation standards) CPU.
and even wins against a high speced iMac.
Again - color me unimpressed!
The current iMac design is even older than the iMac Pro - its just had CPU and GPU bumps - the better cooling, speakers etc. on the iMP should, frankly, have trickled down to the regular iMac by now and probably will when it gets its long-overdue update. Heck, even the Mac Mini has a relatively cheap 10GB Ethernet option. Then there's the T2. Second prize,
two T2s...
A regular iMac with 8 core i9, 32GB RAM and 1TB SSD and Vega 48 is $950 cheaper than a base iMac Pro and will beat it in a sprint. You can also shave several hundred dollars off that by taking 5 minutes to upgrade your own RAM (not an option on the iMP). So, really, that's over $1000 extra for 2 extra TB3 ports and the warm glow of having Xeon and ECC.
Ultimately, though, there's
never going to be agreement on this between people who can contemplate abandoning MacOS and those who can't. Certainly in the desktop market, the 'price' of MacOS is just getting higher and higher and the products are getting increasingly niche (All-in-one with welded-in screen vs. one-size-doesn't-fit-all single Xeon chassis...)