I have been using Audacity 3 for making music with samples for a few years. And it sort of worked, but there were a lot of things that were inconvenient, like the project sometimes not saving, or getting a "clicking" noise across clips that I had to remove by manually fading in/out each end of the clip.

I tried the Audacity 4 beta a while ago, and it seemed super clean and like it fixed a lot of stuff. I am pretty concerned about the encroaching audio.com things (even though they are completely optional), but I still think this Audacity version has promise. I especially like how you can drag clips to time-stretch them.