That's the other one I usually try to mention on threads like this, but last time someone pointed out that the one company pursuing it folded. There may be some ongoing research.

On the other hand my understanding is that MSO is used today actively to deal with e.g. chemical weapons disposal etc.

I'm not qualified to give a detailed answer.

MSO happens at much higher temperatures than TDP but doesn't require pressurization, whereas TPD is essentially a pressure cooker.