The web application proxy is very easy to configure with single sign-on (SSO) as well inbound/out bound authentication for cloud applications like Office 365, Azure etc., which otherwise requires separate deployments of them separately or using third party products such as Okta / PingFederate.
It also helps us reduce our workload by automating many tasks related to SSOs across apps & services deployed at different locations within an organization. We have not found any major issues so far but would love if it can be made available natively from Windows 10 version 1709 onwards without requiring additional tools that may cause conflicts later downthe road when updates are released regularly over time. Automation through configuration management tooling makes life easier compared to manual workarounds required earlier due to lack of knowledge about these technologies used internally throughout my career till date! Reduced.