I've never thoght about this, but I can think of one disadvantage (error) that would be introduced:
Say the atrributes are in the directory entries. Then, say, you change the file /home/eshwar/text.txt and save it. The de modification time of the file changes of course. This modification time is in de the directory, so the mod. time of the directory /home/eshwar is updated as well. The mod.time of "eshwar" is update in /home, the same happens again. Lastly the mod.time of "home" is update in /.
The mod.times of all parent dir's, allways up until /, will change to the time of the last modified file in the whole system!
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