Add an audio item(s) glue feature...  That's right, you can now
turn multiple items into one by pressing CTRL+G, including
the per-item effects and fades...  It really shows it's power with
the SBSMS timestretching mode that allows different start/end pitches,
I was able to conjure batshit-crazy sounds out of this feature
within about 5 minutes of it's existence.

PyDAW still is not even one year old yet, and audio continues to
massively improve week-after-week, while Ardour flounders around
with basic stability issues and laughably bad MIDI.  Then there's
the choice of LV2, or "how not to make a plugin standard".  Some
of you bastards definitely bet on the wrong horse ;)