So what use does this serve? Another fingerprinting vector to narrow down browser versions, or worse -- a security hole.
When the "Web Audio API" was rolled out by the Chrome team not only was it fundamentally flawed, but it also contained memory leak CVEs.
Every time they add more trash to the browser nobody asks for (except their ad clients), they introduce more security problems.
So -- why are they adding more APIs when they could fix the old ones that are utterly broken and abused daily by the ad industry? $$$.