As bash has mentioned, there are other uses. Frank, you're writing off the legal uses (as well as the questionable ones).

And it stinks having to use a PC to access a bluray and then transfer files to my MorphOS system.

Then there's writable blurays, a nice upgrade from DVD-R. I don't know if they require UDF or not.

"it's unlikely you will ever see support for that in MorphOS" ouch! hopefully you mean defeat of DRM, because being able to read UDF format doesn't necessarily imply that