A modern WCM supports frontend-agnostic content management and delivery. The ability to separate content management from the presentation / front-end is a must.
With a decoupled architecture at its core, powerful, easy-to-consume APIs and a rich toolset for the presentation layer, Sitefinity is a genuinely decoupled CMS.
Sitefinity 12.2 supports webhooks that trigger on specific events. In the long run, this means various integrations with microservices outside of Sitefinity for separation-of-concerns-driven scalability and modularity.
Sitefinity's 3-tiered architecture lets you build rich UIs with REST APIs for content and layout utilizing a modern and future-proofed framework in .NET Core.