Fwisw, i scripted my own GC (no not garbage collector) a few years back, since, i have never even bothered looking at the engine stuff.
Chaos is trash. Nanite much the same.
A custom built engine on PhysX will solve most of the real issues you get during development.
And also, it’s nicer to he able to have stuff you want happening with the geometry collections, like runtime based mesh fracturing via procedural slicing for instance, or just a pre-pachaged and highly manicured fracturing setup.
I don’t think the engine built in stuff offers any of that type of modularity. At least, it didn’t when I decided to make my own module…