I was thinking, what are the slots for in the bottom plate of all DE solid/straight bar razors? They must serve some purpose, but I don't see how a solid bottom plate wouldn't give just as good of a shave.
I just shaved and paid attention to the slots. The lather doesn't come out of the slots while shaving. The lather builds up on the front of the bar and sometimes overlaps and might make it look like lather is coming out of the slot, but it's really not. I guess the only reason they are there is for when you rinse the razor.