>If you look at a lot of the old original UNIX programs that were written back in the day, a lot of them looked very similar to this. So it's a great style.
The original UNIX programs weren't known for good style or being big free
Then why is everything based on UNIX then? (Or at least fated to be, via WSL.) If you want a real jewel, check out the v6 rand() function. It's an example of a function so bad that world-class experts on the subject of randomness have been falling over themselves for decades in academic papers talking about how to fix it.
It's not based off UNIX's code. UNIX based system's popularity can essentially be attributed to network effects. For most use cases it's good enough that it's not worth switching to something better because you lose the mountain of resources (both technological and human) that exist in the UNIX ecosystem.
The original UNIX programs weren't known for good style or being big free