It is easy to be overwhelmed and lose focus when a large number of tabs were opened. I suggest adding a shortcut and/or menu option to fold the tree. It will be a fast way to regain focus and sanity.
before: the ever-growing tab tree
after: folded tree with only "main branches" visible
Tree structure collapsing is commonly seen feature. For example, Visual Studio Code has an option "Collapse Folders in Explorer", as well as fine-grain folding/unfolding of code blocks in source file. They serve the same purpose to zoom out and help user regain clarity. For Orion, a single command to fold the entire tree would already be extremely helpful.
