Modern NoSQL databases like Couchbase have made significant strides in security, data consistency, and ACID transactions, dispelling common misconceptions about their capabilities. Unlike some early versions of MongoDB, Couchbase has implemented strong security measures such as encryption, access management, and monitoring, and its document database is strongly consistent, allowing for control over data operations. Additionally, Couchbase supports ACID transactions, which are available in multiple programming languages, including .NET, Node.js, PHP, Go, Python, and C SDKs. With modern NoSQL like Couchbase, users can rest assured that their data will be secure and consistent, making it suitable for critical use cases.