TL;DR We need a better flag reason for questions about tech support for modded Minecraft.
Yes, yes, I know, we have discussed this 4 years ago, but so far the only changes in hope of solving this issue is the update of the /help/on-topic page, and lots of meta posts and discussions. Apparently, we're still getting these tech support for modded Minecraft questions, aka half of the unsolvable questions on Arqade.
Now, as I found out only recently, the best flag reason for closing these questions is marking it as too broad or unclear what you're asking. It is the best solution we have, but it's not good enough. We can do better.
Why isn't the current solution good enough?
First of all, it simply feels wrong flagging an off-topic question as too broad or unclear what you're asking instead of off-topic.
Yes, we have comments to tell the OP why it's off-topic, but we could save some precious time by not having to do that, and have the flag reason do it for us.
There's a good enough reason to call these questions too broad and unclear, right? No. What this actually does, is motivates the OP to add a comment like "I have Windows 10 and I have tried EVERYTHING. Help plzzz!", or in the worse cases, edit the question and add more information to it, which does not help us in any way, because the question is probably still unsolvable. It just brings more attention to the question and casts an automatic reopen vote.
Why should we have a whole closing reason just for modded Minecraft tech support? That's such an insignificant thing, right? Well, it is kind of a narrow topic, but it is a common thing to see, which is why we made it off-topic in the first place. I'd even say it would be the most used off-topic closing reason, along with game-recs.
What is the solution we're looking for?
We've already done the first step, mentioning the off-topicness of this on the /help/on-topic page (thanks @Wipqozn ♦).
The next step is creating the flag reason. How do we do it? I would suggest something similar to what our fellow @Robotnik ♦ did in his answer to the same question:
This question has been placed on hold as Off-topic by <Users>:
Questions that request technical support for modded Minecraft are off-topic. This includes crashes, errors, and issues arising when using mods and modpacks as well as Forge and other mod loader issues. We allow an exception for unmodded or 'Vanilla' Minecraft, please see How do I ask a good Minecraft Bug/Crash Question?.
For the user flagging, it could look like this:
P.S. Notice how in the flagging options for off-topic, the phrase "off-topic" is sometimes written without, and sometimes with the hyphen: