Even in theory LED won't last forever! And most of time it's the other components failed first due to heat or quality. Your halogen headlights won't be on during the day most of time even in Auto mode or they would burn out sooner or later. To see how long the LEDs can last on our CX-5 if you keep them on all the time, just see this thread:
Daytime running lights dim/flickering
At least my 2016 CX-5 still can pass annual Texas state inspection even if a section of DRL LED failed. But if the LED headlight failed due to the over-usage, you have no choice but replace it or you either get ticket or can't pass annual inspection! We simply don't need headlights with DRLs!