I am technical and it was not clicking

Ed is the standard editor

Common within a very small niche.

I'd wager a lot of people from that small niche are registered on the Fediverse, though.

Aye. Bookmarking this thread to remind people when I see complaints Lemmy isn't taking off enough except for super technical topics.

well, especially since se also works as a domain, so I originally was expecting, to use related syntax for fun se|li (or plain old se/li) and had to go back and reread. At first read it as se/org/li as in, "se OR org OR li" work and I thought, "no, they just said org doesn't work." Then I reread and recognized the sed pattern.

Yeah, press x to doubt

I used these expressions too and when you see them, you know what it is