I just noticed that front page now shows reputation on the "modified [time] ago [name] [rating]" line:
When was this rolled out? What is the reasoning behind that change?
This has been the current situation for as long as
I can remember. (But I'm here for only five years.) the site exists; see this screenshot taken on Stack Overflow over 10 years ago:
Is this feature useful? Well, if you see a question modified by a high-reputation user like Joe, you can be sure there's nothing unusual about it. If you see a question asked/answered/modified by a 1 rep user, chances are they're not familiar with The Workplace rules and their action needs some extra scrutiny.