This question already has an answer here:
Plenty of the questions on this site are such that the correct answer changes over time. A typical example of this is the acceptance of credit cards as a means of payment in certain countries. We may often have a case where there exists an old question (which got good answers at the time of it's writing) which unfortunately now (a few years or months down the road) are no longer accurate or true or convincing enough for someone and they ask themselves "what is it like now?".
- The gold-way to do this would be to place a bounty on the old question asking for more recent answers.
- Alternatively (especially new users without much rep to share or knowledge of how the site is intended to work) might ask a new question.
Now a lot of things could or should have happened:
- The new Japan question could or should have been closed as a dupe of the old one. There is not a single such vote however even though the older question has been linked in a comment from the beginning. In this case the new OP however would not have gotten their desired information even though we have it readily available.
- Since by now we have a newer question on CC-acceptance in Japan, should the older one be closed as a dupe of the newer one, to direct users finding us from the deep of the web, to the most updated information?
- In the case of Germany / the bounty, the accepted answer still is an old one as the OP has never bothered to come back and accept another answer and the most-upvoted recent answer is on the third place and thus hardly seen by any visitor to the Q. (Disclaimer: that answer is mine.) Another problem here is that the question at the time was hot (it appears), so that even with a community effort to up-/downvote recent/outdated answers, more recent answers will always be less visible.
My question now is what is the best approach to similar questions? as well as which of the above approaches is right or wrong? and should action be taken on those examples mentioned?
I am aware that there is not a simple bar an easy solution, and I am also aware that I am touching a Pandora's box about duplicates, but I nevertheless feel the need to discuss this.