Shelf Life For Reviews And Posts
Like so many things in life, it doesn't matter if you read it with discernment - not 'is it true?' but 'in what way is it true?'
I would certainly want a very contemporary review before deciding whether to visit a place, but an older review can tell about the 'arc' of the place: whether it was it different in the past, what it was like when the founder's intent was fresh, what a broad range of people appreciated most about it, and what impression those things add up to.
That can give important clues as to whether the place hass learned from the past, corrected mistakes, kept up with the times, or is headed downhill or is living in the past. (Don't you worry when you walk up to the front door, and all the rave reviews posted in the window are 10 or more years old?)
For a first stab, I'd say a contemporary review should be no more than 9 to 12 months old.