The limitations of online food ordering systems in restaurants include:

1. **Technical Issues**: Online ordering platforms may experience technical glitches, server downtime, or connectivity problems, leading to order errors or delays in processing.

2. **Customer Dependency**: Restaurants may become overly reliant on third-party online ordering platforms, risking loss of control over customer data, branding, and customer relationships.

3. **Operational Challenges**: Integrating online orders with existing restaurant operations can be complex, leading to issues such as miscommunication between kitchen staff and delivery personnel, inventory management issues, and coordination challenges during peak hours.

4. **Quality Control**: Ensuring food quality and freshness during delivery can be challenging, particularly for delicate or perishable items. Temperature control and packaging integrity are critical factors that may affect customer satisfaction.

5. **Costs and Commissions**: Restaurants often incur high commission fees from third-party online ordering platforms, reducing profit margins. Additionally, maintaining online ordering infrastructure and managing delivery logistics can incur additional costs.

6. **Customer Service**: Online ordering platforms may lack the personal touch and immediate assistance provided by in-person interactions. Resolving customer complaints or addressing special requests may be more challenging in an online environment.

7. **Data Privacy and Security**: Online food ordering systems involve the collection and storage of sensitive customer information, raising concerns about data privacy and security breaches. Restaurants must implement robust security measures to protect customer data from unauthorized access or cyberattacks.

8. **Market Competition**: The proliferation of online food ordering platforms has led to increased competition among restaurants, making it challenging for smaller establishments to stand out and attract customers.

9. **Regulatory Compliance**: Restaurants must comply with regulations governing online food ordering, including food safety standards, labor laws, and data protection regulations. Failure to adhere to these regulations may result in fines or legal consequences.

10. **Limited Reach**: Online food ordering platforms may have limited coverage in certain geographic areas, restricting restaurants' ability to reach potential customers outside their delivery radius.

Overall, while online food ordering systems offer numerous benefits, restaurants must carefully navigate the associated challenges to maximize their effectiveness and ensure a positive customer experience.