I think you and the parent post both have captured necessary, but not sufficient, attributes. The problem is that before any of that matters, assuming your goa

I think you and the parent post both have captured necessary, but not sufficient, attributes. The problem is that before any of that matters, assuming your goal is mass adoption beyond narrow niches of the already interested, you need to convince people they should care. This is fundamentally marketing and sales, which are the sorts of efforts many people trying to build these things are actively disdainful of. Moreover, who is the messenger to public? The very same decentralization that makes these sorts of solutions interesting actively works against the sort of marketing and sales activities that would get the non-initiated engaged. Fragmented, uncoordinated, and probably just word-of-mouth messaging against well coordinated, well budgeted, and financially motivated opposing interests seem to me to be the bigger hurdles to overcome than assembling the right software or protocols.