<p>As the original Asker of the META Q you link to, I think "we" (the people on SO who were getting annoyed with questions being closed that seemingly, or at that time, fell between the SO and CV cracks) decided that within the StackExchange ecosystem, what we hoped to achieve with an R-related SE site didn't really fit in with the SE ethos or could be covered within the SO or CV banners (plus some others).</p>

<p>To be honest, I'm now more frustrated with CV and its relationship with R and questions about R than I am with the SO side of things. If you are using R to do stats and have a statistical question about what the code in R is doing (i.e., a function you are using, not something you wrote), then I don't see why that would be OT for CV. Others' opinions do vary.</p>
