Since your talking about user experience, (not mentioning privacy, security, etc.). How is email better in terms of usability than say Telegram or any other app.
Which keep every chat you've ever had.
You can "Save" chats for yourself for later.
You can have usenet-style conversations in huge mega-groups.
You can follow the latest news from channels just like RSS.
All without needing to keep the data downloaded on your device, and backed up in the cloud.
Basically all those separate services you mention (with separate software required to be downloaded to view them) are rolled into in any one-stop-shop chat app. Oh, and it also has phone and video calls too.