Post title misleading, Strawberry project still up and running at https://github.com/strawberrymusicplayer/strawberry , coincidentally I had just installed it on Debian 13. Then saw this post saying Strawberry was taken down except that it wasn't.
Like the other comment says this is just about unofficial binaries that were floating around. That said it's kind of a bummer that Windows/Mac users can't download pre-compiled binaries from their github page. Maybe someone can create a script that does the downloading/compiling for those OSes similar to how some ffmpeg scripts do it e.g. https://github.com/UBTL/ffmpeg-windows-build