I can restrict a members ability to interact with Channels fairly well, but this does not extend to tabs. In the member permissions section I can empower a member to add or update a channel and restrict their ability to delete or restore.
However, all four options are combined in regards to Tabs. If I empower a member to add a tab I am also empowering them to delete an entire plan. Obviously I want a team member to add a tab and call in other document libraries, or lists, or direct links to frequently updated files. Tabs are really helpful and in particular are what I believe makes Teams so powerful. Unfortunately, either the owner has to add tabs for them or run the risk of a member removing a tab, and in the case of a Planner tab, they also have the ability to delete the actual Plan. !!!!!
Hopefully I'm missing something somewhere. I need to empower members to use and access content, but obviously I cannot risk a deletion of an entire plan.
There are other comments in the Teams community about restricting access to a plan's individual tasks or buckets, which I would also like to see. But as a priority for goodness sake please don't empower a team member to delete an entire team plan.