It’s kind of ironic — Cloudflare adds FinalizationRegistry support just to tell us not to use it 😂. But I get it. Relying on unpredictable GC behavior for cleanup in performance-critical environments like Workers sounds like a recipe for subtle bugs.

The bigger takeaway for me: just because a tool exists in JavaScript doesn’t mean it’s safe to use everywhere. Better to use structured cleanup patterns when dealing with Wasm or tight memory constraints.

Anyone here actually used FinalizationRegistry successfully in production?