Depends on what you’re doing with it. WordPress core is built to be highly customizable. I’ve built multiple projects that staple JS/React apps on top of the core WordPress Dashboard experience. It typically meant disabling the default post/page content editing and using WordPress in a headless fashion.

The biggest business chore is usually around user management, roles, permissions—all easily expanded/modified through WP’s extremely well-documented core framework APIs. Custom REST API endpoints are a breeze to implement with or without authentication requirements. If you need external deps, you can manage them like any other modern php project with composer. Deploying is easy with docker and uploads sent off to some S3-like bucket.

One recent project I built had WordPress driving fully custom content for a set of giant LED screens in a corporate HQ lobby that allowed users to build presentations, manage a recurring and one-off scheduling, build, edit, and manage reusable content, view live video feeds of what’s currently on the screens, and request static image and video preview renders from an on-prem media server. Users authenticate via the typical WP dashboard experience, but have rich web app features presented to them for their tasks using the WordPress custom REST API endpoints and the existing WP data model behind the scenes (for the most part). Any business needs they presented were easily absorbed by WordPress through straightforward customizations. IMO, WP is an underrated contender in building CRUD-ware.