>>828>I also don't really get why you'd use anything except "X hours"
Because once I return to a thread, a board or a chan in a month or two I'll have a much harder time getting back on track. I don't know how prevalent this is, but my brain associates events with dates, not with a number of time units that have passed since. For an IB as slow as this one, this is important.
Next, this removes a frame of reference in screencaps. I can create one right now and it would forever say "6 hours ago" for your post.
Finally, this is a trivial calculation that shouldn't take more than 5 seconds for a university graduate to make. This is why I had no idea either why this format is becoming more and more widespread or that such calculations have become hard for an average Internet user.
>>I'll use this post time format because it's less convenient
Convenient doesn't always mean good. For example, memearrowing slowly but steadily erodes one's ability to convey ideas with any measureable degree of complexity in a comprehensible yet succint manner and contributes to emasculation of the language being thus (ab)used.