As far as breaks, Wichard makes one. These require additional lines around the boom and to the deck. An added complexity.
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The DutchBoomBrake is more complex...
but uses the same basic principle, to tie the boom to one side or the other, with a line that uses friction should the boom suddenly swing.
Both require an extra step by crew to release the boom break should the boat want to tack/gybe.
When I intentionally gybe, I prevent the wild boom swing by pulling in the boom to the center of the boat then adjusting the helm to cause the gybe.