We have seen some questions where, after an initial struggle, the poser elects to initiate a new thread in the guise of a new question. For example, from today alone, we have
There are pros and cons for this approach. One argument in favor is that sometimes a large body of eventually irrelevant comments accumulates, so starting off with a clean question might be clearer. An opposing argument is that this can create a complex trail of closely related or essentially identical questions. What are best practices in this regard, how are (or should they be) implemented, and by whom?