I've been querying this and getting short shrift from Noel and the moderator, which frankly brasses me off as someone who's spent hundreds of pounds on Sonar over the last fourteen years or so. I'm not some johnny come lately who's just signed up to BandLab to get his excellent free DAW. And Pow-r wasn't a paid for plugin, but yes, I understand Sonar must have been paying for a licence to have it included in their product for the last few years.
Basically, they're saying it's gone, BandLab won't pony up for a licence renewal when Cakewalk BandLab is a free product, and we should use something else to dither as we see fit.
But. If you check on the Cakewalk Facebook page they are saying:-
"Yes, this was indeed left out while we continue to work through the licensing agreement. It'll be back very soon. Should be the only thing missing that you find, so please don't fret."