https://gameworksdocs.nvidia/Blast/1.1/authoring_docs/BlastUe4_QuickStart.html
clearly states there is adedicated plugin instead of custom build that in theory should work outside of nvidia and chaos.
What I like in it is that the chunks are being generated, so they do not use up too much geometry right away… a few poly wall is few poly wall until it is damaged.
I also like how the “structure support” works in blast a lot better than in Chaos.