to add to your list: 8) avoid cross-origin problems and prevent unnecessary OPTIONS preflights that result in uneeded roundtrips by bundling mutiple FEs+BEs in

to add to your list: 8) avoid cross-origin problems and prevent unnecessary OPTIONS preflights that result in uneeded roundtrips by bundling mutiple FEs+BEs into a single origin with different paths (as opposed to mutliple domains/origins).