Yeah, I read TFA, and my eyes were rolling the whole time. Some people really have a bee in their bonnet that "cat" is named that way because it was originally for concatenating files. Nobody fucking cares. It's the standard way for writing a file to standard out, and the general pattern of "cat file.txt | somecommand | othercommand | anothercommand" is so useful because it follows the pipeline pattern so well - read from standard in, write to standard out - that is the cornerstone of Unix shell commands IMO.

"Oh no, it spawns another process!!" Again, nobody cares.