A DAZ technical bod says:

Third Party Plug-ins [...] should be along shortly as we have kept the PA's in the loop on the SDK changes, and in many, though not all, cases it is just a matter of recompiling and we have great faith in our Plug-in Developers.

As long as Reality isn't one of those "not all cases", it doesn't look like we should have to wait too long for Paolo to get it working—after his vacation, that is.

I've been reading the comments on 4.5 and I'm looking forward to it.

I, on the other hand, never got on with Studio 3, after having started on Studio 4. I think to a great extent it's down to what you are used to.