Browsing the web and reading / sending email are fundamentally different tasks. Twitter and Facebook are fundamentally the same thing. The key difference is t

Browsing the web and reading / sending email are fundamentally different tasks. Twitter and Facebook are fundamentally the same thing. The key difference is that Facebook allows you to limit posts to specific people. Mastodon not implementing a "limited visibility" option would be more like a web browser refusing to implement Private Browsing mode.