[jqpabc123]

I think business doesn't actually want Email, it wants NNTP

Or how about just an email client with better support for mailing lists?

The SMTP protocol supports multiple recipients adequately enough --- it's the client software that could stand some improvement to make it easier to apply/use.

[rakoo]

I thought it would be sufficiently explained in my message. Mailing lists don't fix that because there's no standardized protocl for creating, modifying and removing them. Moreover even if there was, if a user isn't part of the mailing list but wants to see some message someone needs to forward it. If a message was sent before you joined, too bad, you can't see it.

Everything is just a very clunky experience made with ducktape and handmade scripts for something that can't even do all we want. It's totally normal that people flocked to other solutions.