Not really. Interesting posts can get buried easily just because they were posted at a bad time and people don't delve that far into the second or further pages. It's been going for almost 9 years now. I think it's a good idea.
The big issue is you reply to a comment from an hour ago but never get a reply, because that comment was actually made two weeks ago and the original commenter is not reviewing those old posts for new replies. This leads to a silencing of discussion in the worst way where one party has no idea they aren’t getting heard and the other party has no idea they are being spoken to.
I was wondering about that not knowing exactly how age affected the ranking of comments. Does seem like it'd be way easier to just fake the whole thing. I wonder if they show up as newer in the individual users' comment views too?
Deliberately putting bogus timestamps on user actions seems fraudulent. I do not want this website to say I did something minutes/hours ago even though I wasn't even here in a week's time. I think this should be illegal, and it probably is in parts of the world according to some GDPR statute. You can't display made-up facts about a user. It's insane in any case and it triggers unpleasant psychological effects when it happens.
Everyone here is obsessed with putting the correct year in post titles for some reason, but falsifying the timestamps of entire comment threads is okay and defensible?