Summary & Key Takeaways ​

• isPending for derived store keys no longer incorrectly reads true on first landing.
• Derived stores reading async memos through latest() now show correct values immediately.
• Render effects reading errored-then-recovered derived stores now re-run as expected.
• The 'multiple instances of Solid' warning is now more accurate, firing only when instances actually interact.
• Hydrated <Errored> boundaries no longer log 'Hydration key miss' for lazily created content.

Our Commentary ​

Solid's RC releases are always packed with deep, technical fixes. I appreciate the precision in addressing these edge cases around reactivity and hydration. It shows a commitment to robustness that I think is often overlooked in the rush for new features. The improved 'multiple instances' warning is a small but welcome DX win.