It’s annoyingly simple; you have the options, the discussions and the arguments all nicely tied together, including the actual results. Typically this leads to small incremental changes to our processes, and we try to document these on Confluence as we go along, including a link to the discussion on Slack, in case anyone wants to read back on how we arrived to a certain conclusion.
Works quite well for us so far.
(If you have an opinion on the above feature branch vote: we have job openings)
Photo credit: pjohnkeane (CC BY-SA)