What problems have you encountered with the Go language in production?

In production with Go, I encountered several issues:

• Dependency and version management. Before Go Modules, there were difficulties controlling library versions.
• Lack of generics (before Go 1.18). This led to code duplication or using interfaces with loss of type safety.
• Performance issues with GC when handling many objects. Sometimes it was necessary to optimize memory allocation.
• Concurrency bugs. Despite the convenience of goroutines, data races and deadlocks require careful testing.
• Limited support for GUI and desktop applications. Go is more focused on server-side development.

Example: when working with a large number of connections, there were occasional delays due to garbage collection, which was addressed by optimizing allocations and using object pools.