I've paired a Ryzen 2400G (with integrated Vega 11 graphics) with a 1080 Ti. The 2400G only has 4 cores/8 threads, but it does have integrated Vega 11 graphics.
I'm using the Vega 11 graphics to drive a 4K monitor. The refresh rate is set at 29 MHz, which for FPS gaming could be an issue, but for driving the Daz viewport is quite sufficient. If I was worried about frame rates, i'd just hook up the monitor to the 1080 Ti... but since my gaming is primarily focused on 'turn based' titles, i.e. games I can come back to after setting up the next render, it's a non-issue for me.
The biggest issue you'll have with a Ryzen setup is if you eventually plan to buy additional GPUs. The 28 'available' PCIe lanes get gobbled up fairly quickly with things like NVME drives and such, so more than 2 graphics cards probably isn't happening, at least with current gen Ryzens.
Intel CPUs may also be restricted a bit PCIe lane wise, it depends on which CPU/Mobo combo you grab. With Daz Studio, though, using multiple Nvidia GPUs does help/will roughly halve/third/quarter your render times. IF the CPU/Mobo combo can accomodate multiple GPU cards that is.
Now Threadripper, on the other hand, well 3 GPUs is no big deal, 4 even with the right motherboard choice. Even if you buy the low end Threadripper version (the one with 8 cores), you still get 64 PCIe lanes. Of course, you'd have to use one of your PCIe slot GPUs to drive the monitor.
As for system memory, 32GB is probably your 'ideal' target. Anything over 32GB tends to be overkill, at least for Daz, but of course if you can afford more than 32 GB, well nothing wrong with that.
As for CPU core counts, well this does come into play if you ever have an Iray render go CPU only. Which is why so many of us have jumped on the 1080 Ti bandwagon (11 GB of VRAM). There are Nvidia cards with even more VRAM than the 1080/2080 Ti, but they are generally pricey... not that the 1080/2080 Ti cards are all that cheap to begin with, but spending north of $2000 US on a graphics card is simply too expensive for most people's budgets. Plus, multiple Ti cards may be faster than a 'single' pro card, which muddies the water further.
Anyways, back to your question. Yeah, Ryzen does just fine with Daz, so if you are doing Iray renders, don't feel bad about buying one if it's cheaper than the Intel option. But if you are planning on picking up a 2nd, 3rd, and maybe even a fourth GPU down the road, yeah pay attention to your PCIe lanes and available slots that can fit a x16 card (even if the slots are running at 'just' x8, which is perfectly fine for rendering).
BUT, if you are going the 3Delight route instead of Iray, yeah THEN your CPU core counts and core speeds will be a big issue. Most Daz product designers have embraced Iray though. 3Delight support has been waning a bit of late. Sure, you can set things up for 3Delight yourself, but that's another issue...