I don't think we will see a trickle down effect unless there are substantial benefits for the average user to outweigh the cost of switching and learning someth

I don't think we will see a trickle down effect unless there are substantial benefits for the average user to outweigh the cost of switching and learning something new. If there is a single abstract advantages, like 'more security', that might not be good enough. We might as well throw in the kitchen sink and come up with a detailed list of every possible advantage an ideal replacement protocol should offer: - no domain names required to create addresses - 1 terabyte+ attachment file sizes - ability to update and delete messages which recipients have not yet downloaded - mail transfer and storage agent which don't have access to unencrypted message contents - mail agents which can be distributed across multiple personal and home devices - client apps which always and non-optionally use local encryption\decryption - ability to purchase mail serving and storage resources from a competitive commercial market directly from client application. - ability to switch to a different commercial serving\storage resource provider without loosing your previous identity\address.