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The paper (cheap brownish paper on a roll) output from a teletype was a waste because no one ever much looked at it after it rolled out if sight. I joined a computer manufacturer having said I could use a teletype (I never had) but soon we had video terminals - imagine!

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When I programmed assembly language in the 80s, one thing we had was a fast line printer (possibly a Centronix chain or band printer). I never missed the teletype (I used a DECwriter a little), but I do sometimes miss that line printer.

Line printer output is formatted. So the equivalent to this today would be if the assembler or compiler generated a listing as a .pdf file or maybe a web page. It's technically possible I guess, but not something that has caught on- replaced with IDEs.

I tend to think of the mono spaced type on editors as the modern equivalent. I have a single page of green and white line printer paper somewhere, and a punched card I think.

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