With easily accessible drain plugs, oil and trans fluid changes can be fairly simple. Once the first trans pan drop and filter is done, no need to go back inside there again for a long time....hence an easily accessible drain plug(s) is a big plus. On my car the trans cooler line is easily accessible by leaning over the grille of the car. So until the next filter change is due in 7 years, I'll do several easy flushes via the cooler line. If there's a "next" car for me, I'm going to ensure that fluid and filter access is easy enough. When I go to the Indy I'd rather it be for something that includes major wrenching.