We all know that some questions are posted in PSE but they should belong to another Stack Exchange site.
When you vote to close a question, via Close question > A community specific reason > This question belongs on another site in the Stack Exchange network
then the two only options are physics meta and mathematics.
I've read in other posts that only sites whose migrations have been remarkably usual have been included, and those are physics meta and mathematics.
The question is: Why don't we include the option other site?
I'm asking this because there are many times in which I find questions belonging to several sites: biology, hsm, chemistry, geology, and so on. The problem, of course, is that this list is too diverse to ask for a mathematics-like status of all those other sites.
Therefore the question is just: why isn't there an option simply called "other site"?
In my opinion, that option should display a selection menu with the list of all sites, and I don't think that's so hard to do, but I'd understand that it can be complex to run afterwards. However, I find the option "Other" quite neccesary. Such an option would just call for moderator intervention, a moderator who would decide where to migrate it.
Would that "other" option be possible? Thank you