Collector: v10.19.1
BCD: v8.0.3
List of testable BCD keys not covered:
(Either need to be marked as untestable, or a test needs to written)
List of early Collector keys:
(Need to test for support in nightly and/or behind flags, or add as an "all-false" feature, or declare as "too early" / "spec fiction")
If a key is not in the "early" feature list, it can have a variety of reasons:
standing: good.