Drupal has been found to have a lower approval rating among new users compared to expert users. 
This led to an initiative being launched by Drupal's founder, Dries Buytaert, to address the needs of beginner users. 
This initiative bundles together three modules - Media, Layout Builder, and Claro - that together create a more user-friendly experience for new users. 

On the surface, this doesn't make sense. Any average D10 site is probably one of the most complex #symfony apps in the world. When Drupal 8 was being built, I remember how the community found and patched a ton of edge case bugs in PHP and Symfony because it is SO BIG and so complex. So - how on earth can it possibly be more performant than Symfony itself or Laravel, or even close to CodeIgniter which is optimized for performance?

Drupal 10 will be supported until the release of Drupal 12 in mid-late 2026
Beginning with Drupal 10, a new Drupal major version will be released every two years in even years (2022, 2024, etc.). 
Each major version will receive active support for about two years, followed by maintenance support and security coverage for about two more years. 
Each is supported until two more major versions have been released.
 

The fifth and final feature release of Drupal 9 brings a stable CKEditor 5 module, a command line theme generator, and helps prepare for your update to Drupal 10. 
Bugfixes will be provided for Drupal 9.5 until June 2023 and security fixes will be provided until November 2023.
 

In Drupal 10.1, completely rewritten aggregation generation logic solves both of these issues.

Aggregates are now built by a dedicated route, with the main request only responsible for generating the aggregate URL based on libraries, theme, language, and grouping logic.

This change resolves the cold cache stampede as well as makes things more robust against race conditions

A comprehensive idea of who, and why they are visiting your site, as well as a common language for stakeholders to use,
means we can more easily define complex functionality.

As we develop a set of scenarios, the team ensures that all of the desired functionality is represented.

This process generally dictates the functional design, and to a lesser degree, the interface design.

Drupal 10 - New Features, Release Date, Migration/Upgrade

Drupal 10 is planned to release on December 2022, the expected release date is 14 December 2022.

Drupal-10 is coming with lots of new features and improvements, Developer who didn't fall in love with the Gin Admin theme will experience a clean and modern admin design. 

Drupal 10 will be a refined version of Drupal 9 including all the goodies from all initiatives. It will include Olivero, Claro, all the work from the Automated Updates Initiative, Bug Smash, Easy Out-of-the-box, Decoupled Menus, and the Project Browser if we have one in time. So it will include all of the results of all the work that the community put in.