I'm with ed-h in that,we use biscuits almost exclusively for line-up purposes.Rarely as "glue elements".....more when there is a tricky,hard to reach/measure situation.Also,rarely in anything but a 90*...a style to carcass is an example.We use them most often to "hang" cornice sections on library book cases and some ornate kitchen heads.
You can accomplish a dado by the build-up method vs the cutting/milling way.Imagine a 1x12 board.....in between shelves you simply have 1/4" plywood "spacers".These spacers lock the shelves into place.We don't use this method a lot...but it does work and is incredibly fast/strong.It is an expedient for those without certain tooling.Further,it does open up your case interiors for some neat designs....you can scroll the 1/4" with whatever designs your little heart desires....then it forms "relief" inside the case,between shelves.We use this often enough with various religious symbols...it's pretty "trick",haha.
You can accomplish a dado by the build-up method vs the cutting/milling way.Imagine a 1x12 board.....in between shelves you simply have 1/4" plywood "spacers".These spacers lock the shelves into place.We don't use this method a lot...but it does work and is incredibly fast/strong.It is an expedient for those without certain tooling.Further,it does open up your case interiors for some neat designs....you can scroll the 1/4" with whatever designs your little heart desires....then it forms "relief" inside the case,between shelves.We use this often enough with various religious symbols...it's pretty "trick",haha.