It’s a good feature if it’s relevant. For example, we could have one Brexit thread, everything in there. All 20,000 posts wrapped up nicely. Perfect.
It doesn’t work if people bump old threads to the top, but I really think that’s an overstated problem and not one I’ve ever encountered on any other board ever. People who do that will soon get bored.
But this goes back to my point where not everyone will agree and some will be disappointed.