This time I'm the one complaining, and I must admit that I'm curious about the exact wording of that question about release time frames. If you asked "how often do you want to make config changes just so you can update Webpack to the latest version", I bet many people would answer "never" instead of "6 months" :-)
But hey, we established that we have different ideas about what the compat sweet spot is and you and yours are the one doing all the selfless work and I'm the guy complaining on the internet, so take everything I say with a bag of salt.
All that said, any chance you could make a teeny tiny little link from the Webpack 1 "THESE DOCS ARE GONE" pages to http://devdocs.io/webpack~1/ or some place like that? There are people who inherit old codebases and it would be very nice for them to not _have_ to update Webpack just to find answers to their problems.