A metric without a boundary is marketing
Throughput, recovery time, latency, and availability describe a measured system during a period. They should not quietly expand to describe an organization or every adjacent service.
Preserve provenance
Founder-built products and leadership experience can both be relevant evidence. They are not interchangeable, and credibility improves when the ownership is visible.
Use evidence to govern change
Treat acceptance tests, telemetry, recovery exercises, and decision records as operating assets. They help teams decide whether a modernization step is actually safer and more useful.