I understand why. We watched a 45 or so foot metal French centerboarder try to anchor next to us inside the Cranberry Islands. I didn't take notice until the subsequent grinding of the windlass after the 3rd attempt, failed. Up came their bright clean Rocna.
Curious. I noticed my CQR took a bit longer to set the day before but was finally secure after full reverse. Plus I watched another boat raise anchor and saw a lot of weed come up on their hook(I don't recall the style).
We stayed put for a few days. I leave my CP on 24/7, for more than any other reason, to see that my anchor isn't dragging. The pattern painted, wind direction, shifts, tide range concentric circles on the screen, tells it all.
When we did finally pull up the hook, we pulled up a couple bales of weed in a ring above the CQR. It was a thick mat of weed that took the boat hook to dislodged. Below, the CQR flukes, that penetrated the weed mat, were filled with mud.
The Rocna is clearly a better anchor, but in these conditions, it's larger fluke area may work against it to penetrate the weedbed. In fact the old Fisherman style still used by many of the schooners on the coast, would likely be the best anchor of all in this anchorage.
BTW, anybody use one of these new hoses? I had to replace my washdown pump this year so added this collapsable hose. It's fantastic! The 25'er will just about fit in your pocket when there's no water pressure on. It turns into a stiff hose when pressurized. The benefit is it takes up no space to stow below(where as 25' of stiff hose was a pain to deal with).