Another way to put this is avoiding feature branches enables a team to achieve better continuous integration. Its related to continuous delivery and continuous deployment but those are downstream benefits to achieving better continuous integration.
A team can use feature branches and still achieve a high level of continuous integration, but it requires more discipline.
Reading this discussion, I think I have concluded that there are a lot of pain points for a team to encounter when switching from feature branches to trunk based development. However, I think I would argue that those pain points already exist and just aren't as apparent when using feature branches.
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