I didn't say, "why arent you using a 50-year old paradigm". I am asking, why are you not literally using a software developed in 1970? For example, are you usi

I didn't say, "why arent you using a 50-year old paradigm". I am asking, why are you not literally using a software developed in 1970? For example, are you using twm? xterm? Admittedly those are only 30 years old but I don't know any older examples that are still supported.