Summary & Key Takeaways ​

• SolidJS 2.0.0-rc.4 introduces invoke(fn, options, ...args) for per-call server function invocation.
• New patch-mode list hydration improves performance by claiming and registering rows positionally.
• The list driver now supports keyed <For> over store arrays with optimized row operations.
• Enhanced diagnostics include DEV.diagnostics.setConsoleFooter(fn) for point-of-pain discovery.
• The compiler registers call-shaped component bindings for improved Hot Module Replacement (HMR).
• Hydration-latched computations now correctly handle mid-stream dependency changes.
• Babel plugin and native compiler ensure consistent patch-mode output and hydration ID parity.

Our Commentary ​

SolidJS 2.0 is shaping up to be a beast. The server function invocation is a big deal, pushing Solid further into full-stack territory. And the patch-mode list hydration? That's the kind of deep-level performance optimization that makes Solid so compelling. I'm also genuinely excited about the improved diagnostics; anything that makes debugging reactivity easier is a win in my book. This RC feels like a very solid step forward.