Ardour has been updated to v5.6.
Although there are no major new features in this release, there is the usual list of dozens of bug fixes major and minor, plus some workflow and GUI enhancements. There has been a significant rearrangement of the transport bar to try to use space more efficiently and effectively. The new design also permits session navigation while using the Mixer tab, and there are numerous optionally visible elements. Similarly, the Preferences dialog was rearranged to try to make it easier to find and browse the many, many available options.
Other interesting new features: session archiving, a new General MIDI default synth for MIDI tracks, and direct and immediate control of routing for heavily multichannel (typically multitimbral) synth plugins.
More details at ardour.org/whatsnew.html