Why does error monitoring need to impact Core Web Vitals?

Quick question for frontend engineers:

Why do most production error tracking SDKs still block the browser's main UI thread just to serialize stack traces and DOM breadcrumbs?

With Google actively enforcing Interaction to Next Paint (INP), adding 100KB+ of synchronous telemetry code directly hurts user experience.

I built SnapTrace to dispatch asynchronously via native navigator.sendBeacon (0ms delay, strictly <5KB footprint) with on-device regex PII masking:

👉 https://snaptrace-dashboard.vercel.app/test

Does your team monitor the performance overhead of your third-party SDKs?