For those interested in the epoch proposal: * I've included a discussion on an alternative set of rules for epoch assignment dubbed "lax mode": https://github.com/joaquintides/boost_epoch#strict-vs-lax-mode This mode is somewhat more comprehensive that the original, strict mode, in the sense that more libs would progress to higher epochs. Comments welcome on which mode fulfills best the goals of the proposal. * I've written a utility to automate epoch assignment from a core set of human-decided lib rejections:   * Strict mode: https://github.com/joaquintides/boost_epoch/blob/master/epoch_report.md   * Lax mode: https://github.com/joaquintides/boost_epoch/blob/master/lax_epoch_report.md These are illustrative examples pretty much dependent on what libs are determined to be subsumed by the C++ standard or more modern Boost libs. You can try modifying this (https://github.com/joaquintides/boost_epoch/blob/master/epoch_report/boostep... ) and running the epoch report tool to see the results. Best, Joaquín M López Muñoz