Lately there's been said a lot about factionalism, self-determination and existential fears in community, especially with respect to Developer Testing website. It seems, lots of people are overwhelmed by sheer number of questions on SO and feel like their particular field (software testing in this case) becomes belittled or unimportant there. (Regardless of whether there's a technical way to watch for interesting tags only)
Now, let's turn to SQL. There we have a concept of views: we can select whole table or just some set of rows and call it a 'view'. And this view we can treat just like a normal table: execute select, join, update or insert. We don't even have to know it's not a table.
Applying same concept here, what if all SO questions tagged 'testing' and 'unit-testing' were automatically displayed on a 'faux website' testing.stackoverflow.com? And questions created through testing.stackoverflow.com interface were actually saved in SO database with additional 'testing' tag.
I understand that this is big, labour-intensive proposal which can't be implemented on a whim. And still, it feels like the current way of chopping off communities, 'all or nothing', doesn't always work. Maybe we could benefit from an interim solution, offering both small cozy home for testing experts and one big community for all programmers.