I have tried them and they are too expensive, do not last long, and are unreliable in a serious recovery. Genuine rated shackles are cheap and never fail. They are also no much heavier than sofshackles. A typical 14T soft shackle, when new, and used...... Sorry mate I read that a 14T soft shackle is equal to a 2T steel shackle.... might have to let that marinate a bit!!
I believe your info on soft shackles is extremely outdated or non existent! They are by far the future and the now.
Ill take a softy for a recovery over steel everytime (equivalent ratings) recovery ri gs over pulley blocks and dyneema over cable!