100x this. Several times now I’ve been asked to troubleshoot instances where the root cause were plugins which had been installed but never used.
Aside from creating crazy UI clutter, when you rebuild there’s always the risk that a change hasn’t been reflected/supported within a plugin. When that happens a rebuild may fail, or lead to unpredictable behavior.
In one of those instances they had easily ~20 plugins in app.yml and were only using two.
Talk about taking unnecessary risks 