Keep them. You will find a use. If nothing else you can dedicate them to specific formats.
Saves swapping lenses.
This is my setup
Elwood for 5X7 and 8X10
Saunders for medium format and 4X5
Vivitar for just 35mm
Besseler MX45 condenser and cold light 110-4X5 for guests
Small Omega and Durst for teaching kids
Besseler with 3 heads in storage.