In the latest SDK, for instance several TACAN-related #defines were added to WASM/include/MSFS/Legacy/gauges.h . Also, the F/A-18E uses a new (?) "legacy" .fx for its afterburner. Does this mean that such things, though said to be "legacy," are actually still fine to be used? (But others, like the legacy flight model, probably truly are not to be used if you at all can avoid it.)