half a day to type
You keep dwelling on that, but I think you're misdirecting. He wrote, "spend half a day writing and debugging code", not "half a day to type in one line".
If someone has a bug they need to track down, they're far more likely to waste cycles on a line like $_=do{local$/;<>}; than one like $_=read_file($file);
Now let's compare apples to apples:
use File::Slurp;
my $text = read_file( 'filename' );
vs
my $text = do {
local $/;
open my $fh, '<', 'filename'
or die "Error opening filename for read - $!";
<$fh>
};
For most programmers, the former looks sane.
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