[bsder]

Zero terminated string is a special case of sentinel value termination.

And sentinel value terminations make a lot of sense when you have punch cards and fixed length records that you need to carve into pieces.

Nobody expected any decisions they were making in the 1960s and 1970s to have any bearing on computing a half-century later. They all expected to have their mistakes long papered over by smarter people at some point.

But we ALL make the mistake of underestimating inertia.