I'd like to see the price of a single memo or any acttion on Memo down to 1 sat. Is it possible? What do we need to achieve that? Better software of protocol upgrade?
You can try that with Electron Cash: set the fee that you want and write your memo in the OP_RETURN field following the protocol.
I guess, u're right. Centralized interfaces to Memo will focus on fast confirmations to improve UX and nodes' load, and inevitable decentralized interfaces will have more flexibility