I like your thinking. Deterministic replay with QEMU is supplemental to the larger goal of reproducible builds. The communities concerned with the topic of reproducible software not only expect cohesive human-readable code that runs deterministically to produce binary reproducible results, but their originally stated goals require it.
Deterministic replay with QEMU is a "power tool" in the larger picture of these efforts.
Deterministic replay with QEMU is a "power tool" in the larger picture of these efforts.