I tried to explain more about the "why?" and benefits in this Reddit post:Not everyone here uses Reddit, so let me quote the relevant parts so we can get some discussion and feedback going here - I would much appreciate it.---You may not have seen the proposal, because my posting to bitcoin-dev seems stuck in some moderation queue. And I guess the post on /r/Bitcoin never made it past the automod. Here's an uncensored link to the original post:Replace BIP9 by something that lets us configure voting threshold and other parameter for each version bit representing a proposed change.BIP9 used a fixed 95% threshold and 2016 block window for all the version bit. We know that didn't turn out well for some soft-forks who miscalculated their support level badly.Of course not every change proposal (whether soft- or hard-fork) is equally contentious, so it just makes sense to be able to configure a 75% threshold for something like BIP101 without having to change the voting machinery each time, while maybe keeping a 95% or 90% threshold for other things going on.Other benefits are that one could easily relax the threshold of a fork if the initial 'guesstimate' of the required degree of consensus turns out to be way too high.The window size would also become configurable per bit, adding the option of better reactivity, if a change requires a shorter voting period.I'm also thinking about making the LOCKED_IN period configurable per bit too, since not every change needs the same kind of grace period in the ecosystem.The end result, hopefully, will be that those 29 versionbits allocated to BIP9 can be put to better and more flexible use in the future.The goal is to make protocol upgrades less dramatic and thereby keep Bitcoin more competitive.If you have any ideas or suggestions, this is a good place to discuss while I wait for the BIP editor to get back to me on the status of the mailing list submission.Another good place to discuss and provide feedback is here: https://bitco.in/forum/threads/bip9-generalized-version-bits-voting-bip-genvbvoting.1968/ [ this post - ignore the link ]Thanks in advance!