Non-Instantaneous Vehicle Dismantling

Building vehicles isn't instantaneous- so why should recycling them be? I propose that Vehicle Depots (and train depots) should require time to scrap a given Vehicle. This could conceivably run in parallel to the collection of parts for a vehicle for construction in the same depot, albeit not the assembly itself (though since the Train Depot has 4 lanes to the Vehicle Depot's 1, it might be able to do that anyways...). This would make "scrap 50 trucks" actually take time, ideally something at least resembling the time it took to build those trucks (not including Vehicle Parts production)- and make it harder to send 50 Mega Excavators into a single, well-stocked depot in quick succession via Vehicle Replacement, and get out a bunch of pickups at a speed that only represents the pickup construction time, absolutely no indication of the time required to move the massive hunks of steel those excavators are made out of.

Good observation, I agree with the proposed solution.