Fun fact: a great many key fobs have --and many owners have zero idea about it-- a physical backup key. The problem is that the key is so well "hidden" inside the key fob that most simply don't know it. For example on many Porsche models, it's impossible to access the physical key inside the key fob without first removing the key ring (a very smart design btw: you cannot accidentally lose the spare key for it's "held" by the key ring): most owners literally don't know they have a spare physical key.

BMW owners often find out they have a spare key when the key fob separate, for no reason, from the physical key (those keyfobs tend to be extremely badly designed, where the plastic knobs holding the physical key tend to become loose with age).

A spare physical key of course means that the door handle has a lock that can be opened with the key.

Wife is stuck under pouring rain with the battery of her BMW's keyfob that died (because she didn't pay attention to the message on the dashboard saying it needs replacing): "Please come pick me up" / "Babe, take the physical key, open the door, start your car with the physical key, come back home and I'll go buy a new battery and place it into your keyfob".

> More recently, there's been a trend of “suck-in” handles that are flush with the body. As noted earlier, flush handles come in two basic varieties.

Handles flush with the body are nothing new that said. I've got a car from 1992 (model came out in 1989) with flush handles.