I have used the anchor which came with the boat... 36# CQR for 34 years very successfully. I upgraded the nylon rode to all chain and windlass.
I used a genuine CQR for at least that many years and was quite satisfied with it most of the time. Occasionally I'd need to re-anchor several times and on the rarest occasions, I'd drag a bit.
In Bequia, there are a couple of chutes with a few inches of sand on a flat coral bottom. Since they are nice open spots, newbies will try to anchor there and of course, fail. We call it the afternoon drag fest and it has nothing to do with guys in dresses.
Anyway, while I'm sitting comfortably on my genuine CQR, one day this boat comes in and drops his gear in one of these chutes and hooks! I waited for the anchor to drag, but it didn't. So I jump in my dink and ask him what anchor he is using. It was the first time I'd heard of the Rocna, but in general, I had been ignoring the move toward the 'next-gen' anchors. After all, what is anchoring but tossing a bunch of heavy metal overboard and letting it do its thing? However, now I was intrigued and began researching. End result was that if I wanted a Rocna, we were gonna have to lean out our expenditures for a few months.
And then fortune smiled upon us and we found a lightly used one (88#, just right for our boat) for a quarter of the new price.
For a year we dove on that anchor and it was a rare day when it didn't set in its own length. It never drug more than about three feet once it had set, just getting deeper till the bar was hidden.
And just to top the experience off, we squeezed into a tiny hole in a very crowded new year's day crowd in Clifton Harbor, Union Island, but the chain got hung up in the pipe and I was left standing on the foredeck thinking of all the disasters that were about to befall us because we only had 60 feet of chain out in 40 feet of water in 20 knots of wind. But almost before I had run through the first scenario of bouncing off both boats behind us, Skipping Stone swung bow to wind and remained where she was until Nikki could free the chain. Boy was I relieved AND impressed.
Over the years we have been shortening up our scope to 3:1 and it has been extremely helpful in the crowded season anchorages, but we still have yet to drag in anything up to 60 knots or so.
I loved my genuine CQRs, but do believe there is something to this 'next-gen' anchor thing now.