I think it said something very meaningful and actionable (admittedly at a high level) about keeping the hot path deterministic: low allocations (including guidelines for GC frequency targets), don't use vthreads (instead use one thread on a pcore that never sleeps, to avoid amdahl), caution about techiques that work at p99 and fail at 99.999... This is not typical for "enterprise" Java, and is an interesting article for those who wish their systems were more deterministic (but may not be aware of the techniques or their cost). This is not a "how to", but that's fine. It's still good content.