It seems to me there are two issues here:

1. What are the pros and cons of adding support for this new mode, e.g. are there any potential gotchas?

2. Assuming the result of 1 is we should go ahead, then omeone needs to generate a pull request including configure checks as necessary, doc changes and tests.

It's getting late in the game for inclusion in 3.7 with only 2 weeks left until feature freeze.