It cannot possibly be for technical reasons. It's almost certainly something to do with this: https://www.vectis.com/media/vectis-ip-announces-call-for-patent

It cannot possibly be for technical reasons. It's almost certainly something to do with this: https://www.vectis.com/media/vectis-ip-announces-call-for-patents-essential-to-the-opus-codec https://www.vectis.com/media/vectis-ip-announces-call-for-pa... Which is complete bullsh*t. Looks like Fraunhoffer and Dolby intend to go after any commercial product using Opus, and demand fees. They claim this is only for hardware devices … for now. As to software, they only state they do not intend to go after open source software. But since Virtualbox is also commercial software, Oracle is at risk.