I feel like those T-tracks will always be filled with dirt, sand, dog hair, mulch and whatever else your travels send back with you. Not ideal if that's really what they are IMO.
Rivian being "bland" is something I've never heard before and coming from someone who drives a vehicle whose design hasn't changed since 1945 just seems odd. BUT unfortunately to your point, I think if any changes are going to be made, they will be toward more bland than more revolutionary since...
Only inconvenience with that is you likely will still have to present your keycard somewhere on the vehicle to unlock and sometimes start, whereas with a FOB or PAAK you have proximity unlock and start. I personally would rather wait a second for the car to unlock than touch a card to the...