Using W, now, is not different than using B before the commit.
It is not a toggle. It does not solve conflict with active tools.
We have one go from active tool to select tool. But there is no return to previous active tool.
If W was able to switch from select tool to previous active tool, it would be an help.
But currently, problem is still present in edit mode or paint mode.
At least, less people will request RMB as context menu and double click to select loop or be surprised by cursor moves.