If you have one long running branch, no issues since you do a mergeback often. All other production-ready code is integrated immediately, so all code is integra

If you have one long running branch, no issues since you do a mergeback often. All other production-ready code is integrated immediately, so all code is integrated in the long-running branch. If you have 2 or more long-running branches, then you put them behind a centralized point and merge them up to this development branch which has a mergeback from production-ready code - so all code is integrated. Either way, you can still integrate all code, its just not in the line of the flow towards production.