You are an expert software architect. Please analyze the following system design and provide detailed feedback on its scalability, maintainability, and security aspects.

The system is a distributed e-commerce platform with the following components:

1. API Gateway: Handles all incoming requests, performs authentication, rate limiting, and routes requests to appropriate microservices.

2. User Service: Manages user accounts, authentication, and authorization. Uses JWT tokens for session management.

3. Product Catalog Service: Stores and retrieves product information. Uses Elasticsearch for full-text search capabilities.

4. Inventory Service: Tracks product availability across multiple warehouses. Uses event sourcing for audit trails.

5. Order Service: Processes customer orders, manages order lifecycle, and coordinates with payment and shipping services.

6. Payment Service: Integrates with multiple payment providers (Stripe, PayPal, etc.) and handles payment processing.

7. Notification Service: Sends emails, SMS, and push notifications to users about order updates and promotions.

8. Analytics Service: Collects and processes user behavior data for business intelligence and personalization.

The services communicate via:
- Synchronous REST APIs for real-time operations
- Apache Kafka for asynchronous event-driven communication
- Redis for caching and session storage
- PostgreSQL for persistent data storage

Please provide your analysis focusing on:
1. Potential bottlenecks and how to address them
2. Data consistency challenges in a distributed system
3. Security vulnerabilities and mitigation strategies
4. Recommendations for improving system resilience
5. Cost optimization opportunities
