Do the vehicles benefit from specialist tools because the manufacturer has innovated some new piece of tech unique to their company, or have they simply taken o

Do the vehicles benefit from specialist tools because the manufacturer has innovated some new piece of tech unique to their company, or have they simply taken off the shelf components and tweaked them just enough that standard tools don't work without adding any actual value? (Nintendo Y-shaped screwheads spring to mind) The answer is probably a combination of the two, so it's always going to be a trade-off.