It's not my words. There is a 1.5 hour long video of a maintainer chat uploaded to their YouTube channel a while ago. There one dev explains it very carefully and in depth – "ugly hack" is their words, not mine! Seems a lot of work to untangle that mess. They are already a long time over their estimates of how long it would take.

Not sure what you mean by that you see your own response. In the current "conversation" (thread) view the chain will only display incoming answers, but never your own outgoing emails – which well... would make it a true conversation view.