I'm the ex(1) troglodyte in question. I don't use custom aliases, because I have had all editing tasks hardwired into my brain for decades, ever since I dropped Teco for ed and then ex. (Ed is the standard editor, but I'm willing to trade off a little standardosity for added convenience.) If the te command had been widely available, I might have stayed with it and not used ex, but that day has passed.

I do pipe stuff through various commands more or less constantly. I most often pipeline through awk, sed, sort, uniq, cat -n, etc. I have a back-burner project to write a meta-editor that works by pipelining and maintains a whole persistent undo-redo history.