TODO items from the old maintainers. No longer relevant.

Change-Id: I699e320af9862fa3dc5f7408a834714668625888
Using empty() makes it clearer.

Change-Id: I031f478aab721af0a65762f98bcde3b2473453e6
Nested conditional !(cond1 && cond2 && cond3) is harder on human brain.

Change-Id: I1c10c7f0f85607a826ec06ffce12de761af3921a
Annotate code & remove unnecessary scope.

Change-Id: I4b8ccef5125c52c48e5d9757bb1f245bf73d0629