Error in subject line. Question applies to Ace not Arc.

I suspect things were ‘perhaps’ pushed back/delayed due to the focus being switched to the Sonos App and the publicised scheduled development work there for August/September/October, but looking forward to seeing/hearing this feature with the new Sonos Ace too.

I would've withheld my Ace purchase at release if this improvement hadn't been dangled by Sonos. And we're still waiting. And there are no more noteworthy app updates lately either.

I suspect ‘noteworthy’ is in the eye of the beholder, I’m sure there are people out there who have appreciated the changes made in the last several releases. They just haven’t touched yet on your desired update to the system.