it looks like it's fairly bad value for money to pay for any CPU with a PassMark score above 20k at the moment.

just about any CPU i buy now will be a massive improvement over what i have, because my i7-6700K only has a meagre PassMark score of 8951.

the requisite motherboard upgrade has other benefits too, such as more modern I/O ports. i'm starting to see a lot of devices that simply expect USB-C to be available.