Horses for courses.
I changed the quad core in my laptop for a dual core quite a while back and so far haven't been compelled to change back to the quad core. Perhaps it's because computers are more a hobby for me than anything else.
I still have a 6 core i7-6800k but unlucky in the silicon lottery with it and disappointed to the point I bought a used 14 core Xeon for about half the price of the i7-6800k. I didn't need a high core count but was interested to see how it worked and if it could be overclocked.
I don't have deep pockets so use old hardware and that's fine, it's not like I have any deadlines to reach. Of course it would be nice to try some new stuff but a little patience required. So far haven't played with anything newer than that i7-6800k.
To quote a well used phrase from Intel.