On Wed, Sep 30, 2015 at 1:11 PM, Mike Hearn via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
Several people have asked several times now: given the very real and widely acknowledged downsides that come with a soft fork, what is the specific benefit to end users of doing them? 

Field experience shows it successfully delivers new features to end users without a global software upgrade.