There was a link on HN yesterday about how Emacs was a great success for 'malleable software' because despite being less flexible than some other programmable s

There was a link on HN yesterday about how Emacs was a great success for 'malleable software' because despite being less flexible than some other programmable systems, it came with a built-in application that was usable out-of-the-box (i.e., a text editor). HTTP won big because it had the web -- Mosaic and Netscape. Spreadsheets won big after VisiCalc showed the way. Where's the app for ActivityPub? I'm not sure I've ever seen "killer protocol, then killer app". It's always "killer app, then extract killer protocol". You need a carrot.