Cheatsheets, comparisons, and decision tables.
Enterprise = 100K/day. Unlimited = 500K/day. But your actual limit depends on license count — it is a base + per-user-license formula, not a flat number.
Platform Events = custom business events you define. CDC = automatic notifications when records change. Use PE for cross-system orchestration, CDC for data sync and audit trails.
REST for most integrations. Bulk for high-volume data loads. Streaming (CDC/Platform Events) for real-time. GraphQL for efficient UI queries. Tooling for metadata operations. SOAP only when a WSDL-first contract is required.