I don't think Utreexo fits into this list. It's an approach to enable a new type of light clients, but the transactions are still on-chain
Is there a good source to get understanding of these solutions? Mainly Ark vs RGB-Prime vs Mercury vs e-cash (fedimint...) vs liquid vs lightning
I think starter for @hynek would be to get a table
  • date proposed
  • activity (number of participants, changes per month)
  • state of current project/UX (idea, definition doc, prototype, alpha, beta, smooth user mobile experience)
  • needs a soft fork? (And which one - covenants?)
  • who is sponsoring it? How much?
  • how many transactions does it require onchain (1 per 3 transactions, unlimited...)
  • what is used for extra data store (op_return...)
  • how many actors are needed to make transaction (e.g. N/2 or just 3...)
  • how many actors can block you from transacting
  • how many actors are needed to steal funds (e.g. 15)
  • how heavy is the client (e.g. 2GB per year)
  • requires being online?
  • requires interactivity from multiple actors?
  • key concept/architecture ("P2P with clients storing state", "low n of validators"...)