Greetings friend thanks for the share you have indeed touchline how mimblewimble protocol works and whats all about which is secret exchange and minimal blockchain as you have explained above, also you have given various factors to be consider if we should integrate mimblewimble into steemit blockchain it complexities and privacy makes it a bit difficult to work with steemit although it scalability part is good for the blockchain thanks for sharing wish you all the best my friend.