There are probably 200 ways to manipulate text on Unix. Does this limit anyone in using the tried and trusted awk, sed, cut, grep etc.? I define my font sizes

There are probably 200 ways to manipulate text on Unix. Does this limit anyone in using the tried and trusted awk, sed, cut, grep etc.? I define my font sizes in em and rem. It bothers me exactly 0% that someone else is able to define his fonts in millimeters or pica’s.