GPU for designer

You’re definitely in the right place, and your planned build looks like a solid step up from your current setup. For the kind of work you’ve described—Photoshop with multiple files, large InDesign projects, and entry-level video editing in Premiere/After Effects—the Ryzen 7 9700X and 32 GB DDR5 will handle multitasking and heavy file sizes well. The GPU is where things get a bit nuanced: Adobe applications are optimized more for CUDA cores and VRAM than raw gaming performance, so both the RTX 3060 (12 GB) and RTX 4060 Ti (8 GB) will serve you fine.

Here are some comments on how GPU power affects the Adobe applications you mentioned:

Photoshop: The handling of multiple documents is affected more by the amount of RAM, and the free space available on any volumes you have assigned as scratch disks. The GPU is becoming more important for operations like machine learning/AI features and layer compositing, but for general Photoshop operations the most important variable is still single-core CPU speed.

Camera Raw/Lightroom: You didn’t mention this, but if you edit a lot of raw files in Camera Raw, this is where a top spec GPU is making the most difference right now (not counting video editing and 3D). Many of the latest Camera Raw features are either GPU-accelerated (they can run on the CPU, but run faster with a good GPU) or fully dependent on GPU performance (they pretty much run only on the GPU and nothing else matters). 

InDesign: The GPU can be used for display, but out of all the applications you listed, InDesign probably makes the least use of the GPU at this time. Like Photoshop, it is an older application where single-core CPU speed is still the main performance factor, and where more RAM is what helps it handle more open documents at one time.

Premiere Pro, After Effects (and by extension Adobe Media Encoder): A high performance GPU is important for these applications because many critical features are now GPU-accelerated. You’ll get the best GPU recommendations in the Video Hardware forum.

The question is about the GPU: some recommend the RTX 3060 because it has 12 GB of VRAM, others push the 5060 Ti with 8 GB.

By @Alex32252670s8p0

The way I listed the apps might help answer that question: The Adobe apps less dependent on a GPU run fine on a lower spec model like a 3060, the apps leaning heavily on the GPU right now could benefit from a 5060 for people requiring top performance and can afford that GPU.

On a strict budget, you just get what you can afford and assume you might have to wait a little longer for some things to process.

I'd be interested in how long people typically go between replacing computers.  I think I am aropund five to six years, but I like to keep an eye on performance charts for CPU, and drive.  I also look at motherboards and how many M.2 slots they have, although you have to be careful about PCIe lanes.  I am not super flash in that respect, but our Dave is clued up and always happy to help. 

I have stayed with 64GB memory for my last two systems, because it never got close to maxing out on my last system.  But I do see some surprisingly large photoshop temp files, so I absolutely prioritise drive performance.  That continues to be an area where significant gains continue to become available.  I then spend what I feel gives me the best bang for buck GPU (currently RTX4080).    

We all follow the Puget Systems articles as they give real world performence information that you can filter by the apps you will be running. Also look at the systems they sell as they are based on a huge amount of testing.

Finally, I now have a workstation supplier that I trust here in New Zealand (Compulsion Tech).  I have had some bad experiences once waiting a _very_ long time for a promised build, and after an amazingly good experience with the above company, which involved several conversations with the owner Ben.  I was able fine tune the spec of one of their high end workstations and he had it to me in no time at all.

Something that has surprised me recently, is that among our group friends on this forum, Jane has the most powerful system by a good margin, and its a Mac!  

Windows 10 has an extended security update program to extend security updates for at least a year as of this post.

https://www.microsoft.com/en-US/windows/end-of-support

Looking forward to Adobe making an announcement about Windows 10 sooner rather than later, so users can start planning for Windows 11 if it's a requirement to use the latest yet-to-be released Adobe software.

The optimal price : performance ratio for Photoshop is RTX 4060 / 5060.

8 GB VRAM will work, but 12 - 16 GB is recommended.

The higher model numbers, -70 -80 -90, will be faster with certain operations (in some cases dramatically so), but it's questionable whether it's worth the rapidly increasing price tags.

RAM and GPU are first, fast SSD storage for files and scratch disk are second. A video card with 16GB of RAM will be the most versatile and probably give the most longevity.

Or just get a decently spec'd Mac, an M4 Pro or Max will give you plenty of power.

I've  got  the rtx 3060 with 12 GB ram in my old 4 core i5 cpu-  zero issues with PS or my beloved flightsim2020.
Your ideal is fine, your current is crap.

Now some will respond with "Naw dude, you need the 256 core i56 with 2TB of ram and the gtx 9090 with 256GB of ram"---no you don't need the latest and greatest.