I find mine are more cosmetic than effective against scuffing from my foot on exiting the car. If anything my foot can hit further outboard on the wing where it curves down.
I now have some vinyl to put there later when I remove my tread strips to polish the wings and refit with stainless screws. The steel ones are rusting and you can see the telltale bumps in the rubber.
If the vinyl gets scratched/ scruffy it is easy to peel off with a warm air gun/hairdrier and replace with new.
