In any other 3d modeling or almost any software, theres a drag a box tool built into the regular select tool that allows you to select things in it. LET ME DO THIS. For a number of reasons. Checking how many units/things are there. Allowing easy selection of a large number of units or objects to put into conditions or other unit based commands.
#Make a drag and select tool built in.
atomic mist
preferrably like the fusion 360 one where it has two modes depending on if you drag left or right for different things.