Jdoorly,
of course, I'm scratching my head - when it itches.
About Dyneema rigging. The strength and weight aspects are definite advantages, but Dyneema has a serious drawback in that it tends to creep under sustained load (if mainly initially). That makes it awkward for some uses, and for other uses you need to factor in the additional length of line.
I've experimented with Amsteel jib and main halyards (written up here, somewhere) and definitely ran into the issue with that kind of elongation. There's a lot of opinion out there, some are down on Amsteel in particular, compared to other types of rope from the same material.
On my other boat (slightly smaller than a DS) I have a halyard based on FSE Robline, which is a rope that's less slippery - I think it's a blend, you can look it up. It may even have cover and core, unlike Amsteel which is 12-strand hollow braid. I'm able to use a ridiculously thin halyard which saves on windage. When the current set of halyards expire on my DS, I might well change to that type of rope, but I'm not sure yet what diameter I'll need for the DS. It should be roughly similar to the wire halyards that were/are used on some DS.
For standing rigging I continue to believe that wire represents the best compromise for our application in terms of durability, no creep, etc, But I'm always curious to find out what real-life experiences people are making.