[boost] [config] Removing support for old compilers: do we have a consensus yet?

Folks, As you know Boost.Config has had it's support for old compilers stripped out, and this is a controversial change. We're now at the point where I'd really like to get the routine changes/updates into release, but to do that we need a final decision on whether to keep (and release) Steven Kelly's changes in develop. So do we have a final decision? Thanks, John.