Good video, very much worth watching despite the length. New UI will look something like this:
with an option for a more classic look.
Looks like an enourmous UX improvement too, and a rewrite to QT and eliminating a lot of technical debt will make development faster.
From what I could tell when I looked into it after a comment someone left on !nebula@lemmy.world, some people were very upset at the privacy implications of Audacity adding an update detection mechanism (which can be turned off, and which is not included at all in the default build if you build it yourself).