On October 18, 2017, Adobe Lightroom Classic CC for released. Now with a new name, this photographer's app is a favorite and a necessity for the working stock photographer. Now faster than previous editions (which had slightly different names), there are new enhancements and features in this latest version. Adobe lists the new features here.
You are going to hear more about a great new feature called Range Masking for fine selection control. This is going to allow you to have even more control of your images. Adobe says that can "Make precise color- and tone-based selections for local adjustments. Use the Adjustment Brush, Radial Filter, or Graduated Filter to define a rough mask, and then refine your selection using new Range Masking options."
Lightroom is not a luxury for stock photographers. It is a necessity.