Almost every aspect of the application has seen improvements, from the obvious ones like the port to GTK4, to several improvements under the hood. Among the new features are:

A new toolbar so you don’t have to remember markdown syntax
A more secure approach when opening and rendering files
Autoindentation and autocompletion for lists and braces
An improved Hemingway mode
The document stats will also show stats for the selected text

flathub.org/apps/org.gnome.git