I understand - as it was discussed plenty before - that list questions, as long as they are concrete and limited, are ok to ask. I am wondering however when the border is crossed on the length of the list.
There have been plenty of questions that ask about a specific feature for every country in the EU and in Europe, which I would think is already a lot since it involves technically around 27 to 45 countries.
Some other questions asked about "which cities in Europe offer"... where the list can go into the hundreds or even more.
Even if the asking person does not require an exhaustive answer, should we encourage people to ask a more concrete question? Should we make a difference between practical questions for actual, planned travel and questions that rather border on research papers?
If we stick for simplicity's sake with the questions of the type "what are the driving rules for each country in Europe...": While I can understand why the asking person would like to compile a list for future use, I would doubt that anyone will be planning a drive through all 45+ countries in Europe (including Zyprus and Malta) in one go and therefore needs such a broad list answered in one go for a practical use.
Would we mind if someone asked "Name me every city in the world that offers vegan restaurants?", expecting a complete list to be compiled? Where is the line? Do we want one? Do we make a difference between practical use and more research type questions?
I would think that instead of answering questions of the above type, we should encourage people to ask questions about actually planned destinations or inquire which destination are fit for a certain purpose or requirement.