I'm not a big fan of the Bulwagga anchor.
Folks can be very passionate about anchors, and certainly everyone has different requirements and expectations, and I certainly do not have the experience that you and others have, so I'm not wanting to get into a major debate about them, but still wanted to comment on your impressions of the Bulwagga, just to offer an alternative viewpoint...
First, it is far harder to stow due to the three fluke design.
Agreed. It's also rather ugly IMO, and can "bite" your fingers if you're not careful. It definitely needs to be kept on a bow roller (but on a bow roller, it's no more difficult to store than any other anchor).
Second, the third fluke, which doesn't bury is liable to snag the rode, and might prevent the anchor from resetting if that happens.
Well, given its design, and having handled one alot, I can't see how it would. There's nothing really to snag that the rode wouldn't easily pass over it if/when the anchor shifted around and tension was put on the rode. I don't see snagging as a real possibility (not sure I could even get it to snag if I tried).
Third, the mechanical connection between the stock and the flukes seems to be a weak point IMHO.
Maybe. Though I don't share that impression, and have never heard of one breaking. Any anchor can have its limit exceeded, so you have to have the right size for your boat (same as any other type).
A one piece anchor with no moving parts is more reliable with greater durability.
I think that depends on what you mean by "reliability" and "durability". I find the Bulwagga design to be the most reliable I've used, or seen used (i.e. sets reliably and in every type of bottom, resets reliably and quickly, holds well) and it seems more than durable enough (again, if sized properly for the boat).
In fact, the sliding shaft is good insurance if it gets hung up, and thus can provide more reliable retrieval. So it's certainly a matter of perspective whether a one piece anchor is necessarily more reliable or durable.
That's why I went with the Rocna.
Rocna was my second choice, and I think it's a really good looking anchor. I'd much prefer to have that hanging off my bow than the Bulwagga, but in the end, it's not about form, but function. I'd rather have an ugly anchor if I can rely on it more.
I'm also not a big fan of keeping your "storm" anchor down below. IMHO, it makes much more sense to size your primary big enough to deal with a storm if one comes up. Most people have undersized primary anchors and have to resort to storm anchors, tandem anchoring or some other method when the weather gets nasty... if the primary is properly sized, then you don't have those worries.
Agreed. Other than occasionally just tossing out a lighter anchor from the stern when stopping briefly, I use the Bulwagga for all "real" anchoring, and then don't have to worry about any surprises.