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"...)