You'll notice
Audio playback no longer caps the total number of plays per session, only how many can play at once
What
The $.audio.play helper used to enforce two limits: a total number of plays allowed per session, and a limit on how many sounds could play at the same time. The per-session total-plays cap has been removed, along with its internal tracking. Only the concurrent-plays limit remains.
Why
Sounds that were previously refused after a session played too many of them will now keep playing, as long as too many aren't overlapping at once.