If Zen 2 is 7nm DUV (also known as N7, the same AMD used for Radeon VII), I doubt Intel really needs 10nm to compete.
They can keep polishing 14nm and focus on their 7nm - to compete with Zen 3 based on TSMC 7nm EUV (N6?) coming next year at best.
But most marketing materials and AGESA leaks mention Ryzen 3000-series, not Zen 2 or 7nm.
People interpret this as Zen 2, but there's no actual guarantee. X370 motherboards (after update) may as well be compatible just with Ryzen 3000-series based on Zen+ (be it APU or not).
Correct. Which means Zen 2 is sure to be expensive*, while it's unknown at this point how much performance/efficiency gain we could get**.
It does seem like Zen 2 will be very short-lived. Basically, they're launching this only because Intel caught up on core count.
And if Zen 2 turns out to be the last generation for AM4, then the "great upgrade path" will suddenly look a lot less great.
*) so why make <=8C Zen2 at all? Why not refresh Zen+ for this segment and save Zen2 for 12-core and up? These refreshed Zen+ 3000-series would surely work on X370...
**) Radeon VII ;-(