So what will the new card get me overall, We just had this upgraded a year and a half ago
This would depend on "which" new card you had installed. All L4000's came with the y-10, y-20, y-30, and y-40 output cards. If you had a
door package option, hot water inject, reclaim valve, or wheel cleaners, the y-50 card would be added. If you have confirmation signage (bay signage on the passenger side wall), the y-60 output card would be added. If you had an alert option, the 60 input card would be added. The y-70 output card would be added if you were using trifoam and also wanted to be able to use a low pressure wax (or rainx) through the arch.
The 19.0a software chip you have in now will do this by using a different plumbing option number. With your machine using the y-24 output now for the trifoam danfoss valve, you'll have to wire a different danfoss valve to y-73 output for a low pressure wax pass ( which normally uses y-24 when trifoam is not an option) and plumb this danfoss valve to the overhead manifold.
Your distributor should be able to talk you this procedure on the phone, if you can do the plumbing and extra wiring.