Have not used them yet.
Perhaps I just don't have a complete understanding of permissions yet. They seem complex...
Agree and I would re-phrase 'they seem unlimted...'.
And I actually like it, as it allows to design a great range of
very simple and easy to manage permissioning rules that are very specific to each project and user environment.
Every deployment usually ends up with only 2 to 5 fixed user groups / user roles that have a clear and natural assignment of responsibilities.
I would also go for layout-based portlet placement (as I have not tried other ways).
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