Just as "web log" became the even more awkward "blog", I suggest we change "newsletter" into "slet"
Then we can talk about the sletosphere, have startups like sletspot and sletlines, etc. It'll be terrible, as nature intended
I made a little tool that lets you search the full text of all published Fediverse Enhancement Proposals.
https://fep-search.glitch.me/
It does so privately in your browser using a neat in-browser elasticsearch-type-thing called FlexSearch: