Yes, Mr. Lucas's books are always fun. For example, his list that starts with something Fight capitalism and he decides to change it to Obliterate capitalism. (I might have it slightly wrong). And as the whole book is saying, those newbies who need a terminal or newbie hand-holding with vi.
Honestly, I'm impressed that you use ed. A lot of his book shows that it many ways, the syntax of commands and search is much like vi, but of course, only one line at a time. Vs. vim.
For example, the other day I did an install of almalinux. Its default vimrc is so full of tricks, I found it almost unusable. For example did a word search, find the word, hit escape and it goes back to line one of the file. (Finally just renamed its global vimrc to VIMBS and then I could work with it.)
Sorry, just wanted to complain.
Anyway, to go return from my fun (for me) digression, I agree it's not very good for writing, but youi should be proud of youirself that you use it. I'm impressed.