I have a drawing I created and am repurposing. I've stripped a number of objects as well as solids from the file.

The file has been edited and saved, compacted and saved again over several sessions.

Now, when I move some curves, there is the delayed cursor that indicates something is being moved. There are no solids associative to the curves. I cannot figure out what surfaces might be associative, and nothing in the layer is intentionally associative, nor in the branch.

The file is too huge and has too many objects to suss out the associativity object by object.

If I click on a solid, feature tree would tell me what surfaces and curves are associated. If I click on a surface or a curve, I get no information in the Features tab.

It seems that I have to create a swept solid just to try to track down these curves' "other" associativity.

(Will future versions/patches to SLT enable discover of associative or orphaned curves and surfaces?)

Concept explorer shows associations of curves. If nothing shows, there's nothing associated, either to begin with or because links have been dumped. Large files can require paging because they outrun memory. That's possibly why you're getting the delay and why 64 bit is desirable.