I'm sorry but how is musescore going to shit? The online subscription is totally separate from the open source app which has had some major development lately and looks and functions amazing.
That being said I agree with your sentiment, the funding for these projects needs to be more robust.
The change from 3x to 4x was huge. It really looks professional now and is waaay less cludgey then before. I have been using it since the 2x days and hoo boy it's so much better now.
The audacity redesign sounds really cool! That's another program which has lasted the test of time and I would be interested to see how they modify the interface.