So that you can mark files and then sort them to the top.
An alternate method is to have checked items have a status label, but I'm not seeing a "match if checked" anywhere.
It is when you enable it in the folder formats > display.
But I use it temporarily. Made hotkeys for check to select and select to check.
So they are there when the situation makes it useful.
I would like a column that does appear when checkbox mode is active.
But I would settle for a way of setting up a status filter, or something like that. Whatever method that we can sort checked items to the top.