Here is a system that comes in just under $1400 including a 10 pro key ( you can save $100 on that with a bit of looking ), if you are willing to drop the 4TB to a 1TB and drop the 2070 to a 2060 you can wait till july 7 and get an X570 and 3700 or 3800.
Wait until July 7 for the new Zen 2 (Ryzen 3000) release. If anything, you will see Zen+ (2700/2700x, 2600/2600x, etc.) discounted (it is currently seeing discounts now) as well as possible price reductions from Intel.
this is correct, the issue for Intel is by then AMD will be ready to move on to 5nm from 7nm+. IMHO its actually interesting to see Intel playing catchup, yes they have slightly better performance per die size but thay also have a near 20 year old core architecture that they have been refining rather than innovating on.
that leaked Roadmap was debunked thoroughly.. there were actual, currently shipping products that weren't on it.
10nm will see a desktop release, but it will likely be for Xeon Ws and the "consumer" lineup will be rather like Broadwell - a few chips, and then straight on to 7nm.
I doubt they'll get 5nm working in just 2 years. That seems a bit overly optimistic, or if they do, it'll just be a die-shrunk version of Zen2 without many benefits
There's been new leaks that say the same thing though, but we'll see I guess. Doubt the new 2019 chips will be 10nm, and if they're coming with their 7nm stuff in 2021, that just leaves 2020 for 10nm, which seems a bit silly