Is Redis Reliable for Long-Term Caching in Enterprise Projects?

Yes, Redis is reliable for long-term caching in enterprise ASP.NET projects, it's fast, widely supported, and integrates well. 
Just ensure:

• Use TTLs to manage cache expiration.
• Avoid storing critical data (Redis is not a database).
• Use clustering or managed services for high availability.
• Secure it properly (authentication, TLS, firewall).

For an ASP.NET project, Redis is a standard choice that scales well and integrates smoothly.