Heh, saying that in a thread about self hosting Sentry is pretty funny :-)
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IMHO, the RUM tooling[1] is the worst offender, tracking mouse movement and keystrokes. At least Sentry is usually just trying to report JS kabooms
1: https://docs.datadoghq.com/real_user_monitoring/session_repl... and https://docs.newrelic.com/docs/browser/browser-monitoring/br... et al