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I actually can't understand what the point he is trying to make....seems rather scattershot.
  • keeping private keys safe is hard
  • users don't know difference between self-custody and 3rd party services
  • mnemonic seeds, multisigs and recovery keys are becoming more prevalent and user-friendly
  • self-custody is needed to keep bitcoin self-sovereign
So thats the setup, and I think its safe to say that everyone agrees with those points. But all this begs the question:
  • How exactly is any given scalability proposal going to help with those things? Does a new opcode mean that users won't need to keep private keys secure? Does it mean that users will then know the difference between self-custody and not?