I find it to be of very limited use.
As a player, it would be a rare situation when I was willing to destroy potential treasure. If the weapon is powerful enough to spend attacks destroying it, it is powerful enough to be valuable.
As a DM, I would hesitate to use this feat against the players except under special circumstances. I would need a good in-game reason to destroy the players equipment since doing so generally makes the game less enjoyable for the players.
As a player, it would be a rare situation when I was willing to destroy potential treasure. If the weapon is powerful enough to spend attacks destroying it, it is powerful enough to be valuable.
As a DM, I would hesitate to use this feat against the players except under special circumstances. I would need a good in-game reason to destroy the players equipment since doing so generally makes the game less enjoyable for the players.