I think, there's still use for it. E.g., I recall when Chrome 32 would fail to play a newly created Web Audio BufferSource, unless the playback call came from inside a decodeAudioData() callback. At the same time, you couldn't use this approach to playback sound from e.g. Safari iOS, since the callback lacked the user interaction blessing, resulting in muted audio. Try-catch wasn't an option either, since, as soon as the playback failed over any attempt to play that node in the traditional way over a null-buffer exception, the source node was already expired and won't play at all. The only way to handle this situation was user agent sniffing in order to detect Chrome and to handle it as an edge case. (Mind that the API was still the same and there was no way to feature detect this behavior.) There's no guarantee that something like this won't happen again.