True story:
E. Allen Emerson once came knocking at the unix cave door, complaining that his older papers, written in LaTeX, were formatting differently.
Upon examination, the only difference, literally, was that we had replaced the ancient 300dpi printers with less ancient 600dpi printers. And yes, CMR is a spindley little font.
I am pleased to report that the makefile for my thesis still works, and generates close to the original doc, 20 something years later. I can barely open a 10+ year old office doc thanks to incompatibilities within the product.
Back in those days, word processors would not do complicated multi-line equations very well; type setting for print, display, etc. This was a problem for me.
To each their own though. I wound up writing some user manuals for products I developed in the late 90's in LaTeX as well. I've not used it much since.