Subject.
Before Groupy I've been using Clover File Manager, and it had the advantage of context menu "open in new tab" option. I think it should be available at least for Explorer, for starters.
Another thing: when creating a new tab in Explorer, does it have to open at the same location you were just browsing? Would've been convenient if a new tab opened at Quick Access or This PC, and if we were able to configure this.