This question may belong to <Another site>, consider migrating - feature request
Often when a question that is clearly a better fit for a different SE site is asked on SO, there are a slew of comments suggesting that the OP post it at xxx.SE or people vote to migrate or a moderator migrates it. All of these take time, and sometimes on tags with less traffic, it can take longer.
Instead, why don't we offer an option to the OP to post on a sister site when they are composing the question? For e.g., if someone writes a question and tags it latex, then when they hit submit, a pop-up can ask them:
There is a site dedicated for TEX and LATEX questions, where you might have a better chance of getting a quick answer. Would you like to ask this question there instead? Yes No
This detection will be based on tags on SO from where questions are frequently migrated. Clicking on Yes will take them to a compose screen on the second site where they can choose the tags and submit (this is necessary so that they choose the right tag. e.g. unix on unix.SE is redundant). That way, the OP is made aware of the existence of such a site and can ask their question at the right site the first time. Worst case, they ask on SO and we migrate it as we do now.
Users familiar with SO and who know that their question is a better fit for SO (e.g., latex + emacs/vim questions) can choose No to post on SO.
Can this be implemented? Is this something that can be easily done (with the current framework) or will it require several changes?