It affects single-threaded performance, which is still, and likely always will be the primary use case. The only reason this has gotten so far is because there

It affects single-threaded performance, which is still, and likely always will be the primary use case. The only reason this has gotten so far is because there has been some major improvements in single-threaded performance which is being used to mostly cancel out the negative effects of no-gil support. I personally would've preferred to have access to that boost instead of tacking on this major change.