> There are already some very feature-rich self-hosted tools in this space (like PostHog) though. Any reason why you wouldn't want to use those tools?

Thanks for mentioning PostHog. It looks promising and friendly: https://posthog.com

I use https://plausible.io (open source too).

As for the reason, maintenance and integration. I only need aggregated insight into traffic such as location (country/state), heat spots on the supabase parts (auth, database), referrers, etc. Most of what I need could be inferred from the logs.