@Deicer and @Xenon27 I have great respect for both of you, but if you mean passive intakes to be intakes without rollers to reorient the cubes, then I have to respectfully disagree with your opinion.
I understand passive intake like the one animated in great 81k v2 and v3 videos where robot needs to perfectly align itself with the cubes to intake them.
These two robots look amazing and play fast through the magik of animation, but this will never happen on the real field.
You cannot spend time to align the robot with each individual cube for the fully passive intake to work. Not with heavy defense by opposing alliance.
If you had in mind Amazing Houdini by teams 9605A and 9421 then I must say that it is not fully passive.
Intake rollers actively reorient and intake cubes that robot meets at random angles on the field, before it takes them into its semi-passive cage claw.
In my part of the world to be competitive you must quickly intake any cubes while opponents play heavy defense on you. I have not seen any robots with fully passive intakes that made it into the eliminations.