Converted my music library from mostly-AAC to Opus: from 11.3 GB down to 5.2 GB! (using some PowerShell to run ffmpeg on all the things) This is especially good for my phone. For some reason Android still needs the file extension to be .ogg not .opus.

Compression in general seems to be a pretty exciting field… Redox TFS promises full disk compression. Maybe not really “full” but with large huge clusters, instead of ZFS’s per-block compression. Brotli already works in browsers for HTTPS compression. Game texture stuff is improving (because 58 GB texture packs :D). A better video codec is coming.

If you still have AAC or Vorbis files — convert to Opus now!