Summary
On August 21, 2026, Vercel introduced always-on tracing that automatically collects sampled traces from production and preview traffic, letting teams debug real requests without reproducing them.
What changed
Vercel enabled always-on tracing that continuously samples traces from live production and preview traffic.
Why it matters
Sampling real requests removes the need to reproduce bugs locally, shortening incident debugging loops for teams running on Vercel's platform.
Evidence excerpt
Always-on tracing collects sampled traces from your production and preview traffic, so you can debug real requests without reproducing them.