Joomla!® 3, the joint-current version of Joomla, continues development of the Joomla Platform and CMS as a powerful and flexible way to bring your vision of the web to reality.
With the new Administrator interface and adoption of Twitter Bootstrap, the ability to control the look and management of extensions is now much more complete.
Working with multiple template styles and overrides for the same views, creating the design you want, is now much easier than it has ever been, and getting even easier.
Limiting support to PHP 7.3 and above makes Joomla lighter and faster than ever. Recommended is PHP 7.4 +
The separation of the Joomla Platform project from the Joomla CMS project makes continuous development of new, powerful APIs and continuous improvement of existing APIs possible - while maintaining the stability of the CMS that millions of webmasters and professionals rely upon.
Here at UsingJoomla.com we started using Joomla when Joomla was at "version 1" we are now at Joomla 3.8.x - so we have seen many progressive steps though from 1.0.x, 1.5.x, 2.5.x. 3.0.x all the way up to 3.9.x and it must be said that the progressive nature to a much improved, and continually improving CMS has been an incredible journey.