The University blog platform will be updated to WordPress version 5.0 today at 15-17, during which there will be short break in accessing the service. As a significant new feature 5.0 will introduce a brand new editor.
The Gutenberg editor is based on building the content with blocks, allowing more complex layouts and embedded content types like full width images, columns, aligned pullquotes, etc.
All of these new features may not be available on current themes. The new default theme Twenty Nineteen however will be fully compatible with Gutenberg. For those more comfortable using the classic editor, it will be available using a plugin.
For more information read the official release announcement, test drive the editor or view the Twenty Nineteen showcase site.