Defrag: with related file grouping?

I've tried O&O defrag, and it seems does a simple job, moving blocks from end to begining, to fill the holes. I mean if I scan through the blocks, they seems contain random data.
Wouldnt it be better if defrag was putting related data, like from same folder, in continuous block array? In my theory this would greatly improove read times, when loading games etc..
I wonder if such tech exist, and what defrag feature it? or would that matter overall?
Maybe access metheod in O&O does something similar, but I'm not certain.

Maybe... I thought its just arrange all files together alphabetically