Shroud extenders are available for most boats, although not class legal for racing on some. An extender is an extra loop of cable that attaches to the shroud adjuster and to the lower end of the shroud. If the boat capsizes, you can release the main shroud from the shroud adjuster, and the extender section takes over and you now have a longer shroud, which lets the mast lean over farther and makes the boat easier to right. After the boat is righted, you reattach the shroud itself to your shroud adjuster. (Apparently, there is some quick way of doing all this, and I don't know whether it involves a "fastpin" or what.)

I think all the Supercats come standard with shroud extenders. I have seen them used very effectively for righting a Hobie 17 (although I think not class legal for Hobies).

The reason I have heard for them not being class legal for some classes is the fear that the extra slack in the shroud might cause the mast to jump off its base during the righting process (although I have not personally heard of this happening).

Also, having a drag chute, or drogue, or sea anchor, or whatever you want to call it, that can be quickly deployed from the front of the boat to keep the bows turned into the wind is a great safety feature. Not only does it make it much easier to right the boat, it also slows the drift of the capsized boat if you are going toward rocks or have lost a crew member overboard.

A drogue (sea anchor) could also be used, of course, if you get caught out in an unexpected storm and have to drop your sails and ride it out. The sea anchor can be deployed off either the bow or the stern, depending on whether you want to go with the wind and waves (but slowly) or hold the bows facing into them.

Both of these options are things I would consider having on my boat if I were doing a lot of recreational sailing (or distance racing) where there are not a lot of other boats around to come to my aid.