You will find as time goes on sometimes what was the right answer becomes the wrong one. My shop has several vises that are no longer used because our procedures and upgraded fixturing rendered them redundant.
I do have a comment/suggestion to keep in mind for the future. Should turn it out that multiple vises are useful for higher volume work but occasionally individual fixtures are needed. The situation on one of our machines. It is convenient to have the vise type that makes it possible to remove all the jaws from the top side. Double lock vises allow this but not all single vises.
With the jaws all removed it is possible to make fixture plates that either straddle the vises bolted onto permanent stand-offs fastened in the table tee slots, or bolt onto the top of the vise base. This means the position of the vises remains constant so you can keep records for work zero locations.
An open mind is a virtue...so long as all the common sense has not leaked out.