As a PM, I use the same 5 tabs all the time: Overview, Automation, To-Do, Related, and History. 3 or 4 of them are in the overflow menu [...] on the right.
It takes like 20 clicks to do the 3 things I need to do to basically every Epic I write.
Give the user the ability to drag and drop tabs into an order of their choosing, and remember that.
Even better than letting me arrange the tabs: consolidate the items for a workflow into one tab.
Or don't have tabs: What if my role as a PM hid all the junk I never use?