I’m new to Blender 2.8, and I’m irritated by the behavior of BoxSelect: When using it in Edit-Mode from the ToolBar it starts a new selection and only extends when holding [Shift]. When starting it with [B], it always extends the current selection, however you can deselect by holding [Shift]. This is quite annoying because I have to deselect every time before pressing [B].
This thread attemps to give an explanation of this behavior (which I personally can’t follow): https://blender.stackexchange.com/questions/64249/how-to-not-extend-selection-with-box-select
I would love to do the suggested “fix” by adjusting the hotkeys, but the UI improved so much Blender 2.8, that I can’t get it to work.