Is the Ryzen 1500x still worth it?

Solution
It's probably capable enough for now, but I wouldn't bother if you can get a second-gen Ryzen processor with 6 cores and 12 threads for just a little more.

1500X: https://pcpartpicker.com/product/VtFXsY/amd-ryzen-5-1500x-35ghz-quad-core-processor-yd150xbbaebox
2600: https://pcpartpicker.com/product/jLF48d/amd-ryzen-5-2600-34ghz-6-core-processor-yd2600bbafbox

At least in the US, the 1500X currently starts at around $150 online, while a Ryzen 2600 can be had for around $170. That's just $20 more for 50% more cores and threads, which will undoubtedly keep the processor relevant longer. Plus, you get the performance enhancements of the 12nm Zen+ architecture, and the possibility of higher overclocks. Even at stock clocks, the 2600...
It's probably capable enough for now, but I wouldn't bother if you can get a second-gen Ryzen processor with 6 cores and 12 threads for just a little more.

1500X: https://pcpartpicker.com/product/VtFXsY/amd-ryzen-5-1500x-35ghz-quad-core-processor-yd150xbbaebox
2600: https://pcpartpicker.com/product/jLF48d/amd-ryzen-5-2600-34ghz-6-core-processor-yd2600bbafbox

At least in the US, the 1500X currently starts at around $150 online, while a Ryzen 2600 can be had for around $170. That's just $20 more for 50% more cores and threads, which will undoubtedly keep the processor relevant longer. Plus, you get the performance enhancements of the 12nm Zen+ architecture, and the possibility of higher overclocks. Even at stock clocks, the 2600 outperforms the 1500X in games though.
 
Solution
I never liked the 1500x, because it's basically an expensive 4 core/8 thread Ryzen. In most cases you'd be better off with a 1400 and use the money elsewhere, considering the level of videocard you're likely to want to use in such a system. A jump to a 1600 is called for if the 1400 isn't enough for some reason. And now with a 2600 as an option the 1500x looks even less attractive.