So then instead of being a simple hands free device, you now have a spring clip that you have to go down with pliers and whilst removing , it will sproing off and land somewhere off in the grass after bouncing off your eyeball
Sounds simple to me . I think I'll stick with the drain plug
I never have liked the idea of something that could easily be opened or snagged on the drain pan., even if you never leave the pavement there are standard unavoidable roadhazards like tumbleweeds and giant possums that just love to bounce off of oilpans. Heck, I know one guy who lost a transmission on a porsche to a jackrabbit ( no extending plug, just a lack of any kind of ground clearance and I guess a jackrabbits head is harder than a porsche gearbox case ). Just not worth the risk in my book.
About the only thing I'd feel comfortable with one of those things is if it had a heavy skid pan covering the oil pan. Some of these new suv's I get stuck working on once in a while have wimpy cast aluminum oil pans, but real stout skid pans protecting them.
----Robert