Ok, so, looking at the release notes:

* It looks like the HDRI preview works essentially by creating a prop, it's just behind the scenes. I hope it's compatible with rotation of the HDRI. E.g. the release notes say "Corrected the Auto created HDR Dome material to not have specularity." So there must be a HDR Dome with the HDRI assigned as a material.

* The simple material editor seems like a nice feature.

* "Optix now requires Nvidia RTX 581." I'm guessing that means Nvidia driver 581 (which happens to be the current version). The driver still supports GTX and earlier cards, so it's unclear whether only RTX cards are supported for Optix (which normally only needs CUDA, I think?). But anyway, might need to update GPU drivers.

* "Removed Cloth Room until we can replace with modern, open-source alternative lib"  Seems weird to just toss it because they will replace it... eventually. Maybe a license issue?

* "FBX and Collada added back to the File Import/Export menus." Was FBX gone? Also "GLTF format added to Import/Export."

* "Removed problematic Disable Drag Docking For All Palettes option from Window menu."   Just don't let me accidentally mess up my whole workplace by clicking in the wrong place, OK?

* "Added preview/working light, included in the Mondello Beach and Wide Street scenes."   Curious to know whether this is actually a thing or they just added some lights with a black simplecolor node....

* "Corrected translate and rotation of default Dolly cam."  Is this going to mess up existing scenes using the Dolly cam? I tend to use it more than the Main cam these days.

* "vectorDisplacement and Displacement behaviors are no longer reversed in SuperFly."   ???