The new design is more accessible thanks to the optimized contrast ratio and adaptive element size.
The updated navigation makes Strapi easy to use for everyone. See for yourself.
With the new Plugin API and a programmatic approach, plugin developers only need to configure two files in the root of the package instead of modifying multiple files.
In v4, the Content API and the Admin API are separated and the access to the Content API can be easily managed using the API Tokens.
Whenever you receive an error, you will know exactly what it means and how to solve the problem.