> moving my RDS Postgres instance onto ARM might not make a difference I have no specific knowledge here but I imagine the x86-64 builds are far better tested,

> moving my RDS Postgres instance onto ARM might not make a difference I have no specific knowledge here but I imagine the x86-64 builds are far better tested, regarding correctness. As cmrdporcupine points out, the performance of the x86-64 builds will also have been better studied. Whether it's an issue in practice, I don't know, but if you're looking to minimize risk, there are good reasons to stick with x86-64.