alt Hacker NewsI had to use ed once in a very limited recovery situation. I don't remember the details but even vi was not an option. It's not terrible if you just need to change a few lines. Using it on a teletype to write code all day would get tedious quickly. Full-screen editors had to have been an amazing productivity boost.
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ed makes a lot more sense if you remember they were printing everything to paper rather than using a glass tty when it was first developed
I had to use it when I installed 9front on a computer that has no graphics card just a serial port (APU2C2). I had only a serial device at 9600bps and the other text editors (sam, acme) didn't worked. I wanted to turn it into a CPU server so I can use drawterm to access it remotely and that requires editing a few files.
The amount of code was relatively low.
Not the million line codebases we have today. 50-100 lines was the usual program or script.
I think ed is still a great editor for specific tasks. As a plan 9/9front user, when you get yourself into trouble, it's sometimes the only editor you've got left (like when graphics doesn't initialize, which I've not seen on 9front — ever?)
It's really not bad, and you can use it for scripting like sed, but it's clunkier.