Which axis of vendor lock in are you seeing possibly being disrupted by this? x86 is rather dominant, though ARM is making a play. RISC V just means AWS offers a different ISA on compute, you'd still be vendor lock-in'd to AWS/whomever. Or I'm totally not getting it.
[flagged]
Obviously not OP, but:
Lock-in to x86 or ARM is painful from an operator like AWSs perspective. With x86 you end up with two vendors to play off against each other, which isn't great. ARM gives you the ability to design your own silicon, but you're still beholden to a single licensor -- arguably worse. On top of that, some customers mandate a specific ISA or even a specific vendor, so none of it is truly fungible outside vertically integrated workloads like S3.
The ideal scenario for a hyperscaler is an open architecture at the core with 10+ competing implementations -- including potentially their own.