user40522: There are quite a few links to list questions that redirect to the error page. I am guessing that initially they were allowed albeit with some heavy restrictions. These are the discussions I found about list questions, but they are really old and not updated: Link1
Link2
Link3
Link4
I just wanted to know what was the rationale(consensus) that led to list-questions becoming off-topic?

user63: Lists are not off-topic. Unreasonable and overly board list questions are. Stack Exchange has a problem where users of their community ask for a lot all at once and give little context on what they actually need. Sometimes these questions are answered, most of the time its not due to the effort involved in covering all the important and relevant points. This puts the majority of the burden on those answering or attempting to answer these types of questions. 
When you ask for a list of thing. There are reasonable requests and unreasonable requests based on scope. Much of the time ppl, not being knowledgeable on the scope or depth, ask for unreasonable things. The guideline are there to ensure those asking keep their questions within reasonable bounds in terms of length, complexity, and coverage.
If I asked you to name all the {insert flavor} things you've ever eaten, plus where and when you had them. Would that be reasonable? 

40522: <p>There are quite a few links to list questions that redirect to the error page. I am guessing that initially they were allowed albeit with some heavy restrictions. These are the discussions I found about list questions, but they are really old and not updated: <a href="https://anime.meta.stackexchange.com/questions/771/how-to-determine-the-status-of-a-list-question">Link1</a>
<a href="https://anime.meta.stackexchange.com/questions/587/how-should-we-deal-with-out-of-universe-list-questions-in-general">Link2</a>
<a href="https://anime.meta.stackexchange.com/questions/470/do-we-still-like-questions-asking-for-lists-of-anime-manga-etc">Link3</a>
<a href="https://anime.meta.stackexchange.com/questions/348/what-is-the-status-of-list-questions-on-this-site">Link4</a></p>

<p>I just wanted to know what was the rationale(consensus) that led to list-questions becoming off-topic?</p>
 63: <p>Lists are not off-topic. Unreasonable and overly board list questions are. Stack Exchange has a problem where users of their community ask for a lot all at once and give little context on what they actually need. Sometimes these questions are answered, most of the time its not due to the effort involved in covering all the important and relevant points. This puts the majority of the burden on those answering or attempting to answer these types of questions. </p>

<p>When you ask for a list of thing. There are reasonable requests and unreasonable requests based on scope. Much of the time ppl, not being knowledgeable on the scope or depth, ask for unreasonable things. The guideline are there to ensure those asking keep their questions within reasonable bounds in terms of length, complexity, and coverage.</p>

<p>If I asked you to name all the {insert flavor} things you've ever eaten, plus where and when you had them. Would that be reasonable? </p>
