The stable ABI is really tricky. Another pointer from another talk was about how stabilizing ABI might reduce the performance hash functions (which is used by

The stable ABI is really tricky. Another pointer from another talk was about how stabilizing ABI might reduce the performance hash functions (which is used by the compiler) by 0.5%. So, it is really a tricky decision to make that involves doing the right tradeoff at the right point in time.