This *is* the nuclear option. If all else fails, it will be the solution. 

That said, I'd like to try a few other things first, and see how they work out. 

First off, we have a gigantic backlog of questions with pending close votes on them. Many of these may need to be closed, but few should be migrated. [A recent change](http://meta.stackexchange.com/questions/151890/disable-migration-for-questions-older-than-60-days) to how migration works removes that possibility for about 8.5 thousand questions with outstanding votes - that's a pretty sizable chunk. 

Second, [I've implemented this suggestion](http://meta.serverfault.com/questions/3800/changing-the-site-subtitle):
![The appearance of the "belongs on serverfault.com" option on Stack Overflow][1]

This is fairly subtle - but it's worth a shot, since a reoccurring complaint is that folks on SO don't understand the scope of this site. I'll be watching to see if it has any effect. 

The % of worthwhile migrations does seem to be fast-diminishing, but there are still a number of questions sent over from SO that are not only accepted here, but *do fairly well* - up-voted, answered. If this becomes such a small portion as to be expendable, then so be it. 

---

Small update: so far, this is *not* getting better, week-to-week. It's getting worse. A lot worse. Last week saw over 70% of migrations rejected. I'm becoming dejected.

---

Server Fault has been removed as a migration path on Stack Overflow. 

  [1]: https://i.sstatic.net/7Qqxf.png