Can’t comment on future product roadmaps - which for me is easy, I’m kept in the dark But yeah, you’ll need at least 1,000 or 2,000 nodes - that’s quite the budget!
I responded (but probably shouldn’t have) - the V2 lowers core count and increases power envelope - it targets HPC workloads, so gives higher performance out of the box (for example, it supports SVE2, AmpereOne is still relying on NEON for SIMD), but that comes at a cost of fewer cores per socket, and higher power per core under load.