We would need to know where are you waiting more, for example booting or opening PS will be maybe 5 times faster in a new machine with SSD, but that only counts as 0,1% of my daily workflow so it won't be worth a full system upgrade.
If you are using sticking programs i think massive amounts of RAM will help cut times (64 GB and up) but that can be applicable to your current system, try to determine how much memory are you using to avoid running out, stitching and rendering times can easily duplicate.
CPU intense apps will benefit from newer models, higher clock speed and more efficiency should give you a 30-40% speed boost with the same number of cores, if you are using multi threaded apps and go for 6-8 cores that can be improved.
And if you are using GPU intense apps such as Capture one and find yourself waiting a lot, a good graphics card will speed it drastically, but if you use Lightroom GPU won't make any difference... once again you will have to research what you need