I find it super confusing that Rhino 9 is on the way, yet many commands are still not included either in the menus or the toolbars (or even absent from both!), hence the user may never learn about their existence! Some commands are accessible only through the text menus on the top, others are seen on the toolbars only.
Take the selection tools for example. I never knew about several of these before, just because the user interface is incomplete and the only way to learn about these “almost secret” commands is to either read the entire online help topics, or try every possible icon and menu in Rhino.
The same goes for many other commands, including important ones for NURBS modeling. 
It’s like finding easter eggs in video games and films.
Rhino has a lot of icons that utilize only the LMB (left mouse button) command, so there is a nice opportunity to include RMB command for the “unlisted” commands that are currently missing from the toolbars. No need to make new icons for that purpose, just make the UI consistent.
