WordPress
With close to half a billion websites, an estimated 43% of websites on the web running with WordPress as their Content Management System, it dominates the CMS market globally.
I have worked extensively with WordPress across my career, and consider it a great tool for all types of projects in different capacities.
Whether developing a small portfolio site, e-commerce shop, or large scale web application, WordPress can provide a framework for delivering it. It can act as an all in one solution, with Themes and Plugins and its powerful Gutenberg block based editor, or as a data source for accessing authored content via REST or GraphQL APIs.