It's worth if you have money.
Not because 2 cores more, it's more important satisfaction with OC and fastest single threaded performance because higher frequency.
i9-7980XE 18 cores OC to 4.5GHz are best enthusiasts processor.
It's important to drain more performance and avoid degradation because high clock.
I can't say I don't like AMD but when you used on something for people as me is hard to completely change course.
But instead i9-7980XE even last 2000 in pocket I would spent on i9-7900X, Rampage VI Extreme in GTX1080.
Look on this way, overclocking i9-7980XE 500-600MHz compare to 1950X who is stable maybe 100MHz over Turbo make nice difference in every day use.
18 cores + 500-600-700MHz.
It's easier to say Why people use i7-5960X when Ryzen 1800X is little better.
And they tested out of box. And avoid debate that Ryzen 1800X owners will OC 100-200MHz, but i7-5960X owners 1500MHz OC.
1000$ is a lot of money, that's Zenith Extreme + 1900X. But anyway is not for people who need to check how much spend on hardware.