The Nexmo team has been busy releasing several new versions of their .NET SDK, including 4.0.1, 4.1.0, 4.1.1, 4.1.2, and 4.2.0, each with various improvements and features such as workflow ID parameter for verification requests, fully functional Application V2 API, redact library, get recording API, strongly typed NCCOs and webhook events, improved signing and validation of SMS messages, and bug fixes including tracking in progress NCCOs. These updates aim to enhance the SDK's functionality and usability.