It's still 3 months before Ryzen 3700x release. That's a long time to wait for something to test while it's possible to do it right now.
Honestly, I get why people want to see benchmarks on the fastest CPU possible, but if you look at the market share, it's so freakin low and doesn't make sence. The best selling CPU's are currently the 2600, 2600x and 2700x. Just look at Amazon, Mindfacory and even when I look in my country, the R5 2600 is the best rated and best selling CPU at the moment. But what do reviewers use currently, the 9900k. Only to limit the bottleneck that 9/10 gamers DO have to show results 9/10 games will never have...
If you search for car reviews, do you search for a realistic review, or do you want to see a review on the smoothest road possible with no turns, no wind and no ups and downs in the road? So why do PC reviewers try to hard to show the least representative figures?