My ears are not between the drivers speakers and the enclosure of the speaker..
They are in the room...
My ears are not between the drivers headphone and the shell of the headphone..
The rooms is on each my ears here..
In the 2 case the "room" or shell, i must controls the SAME factors to optimize the experience...mechancal, electrical and acoustical...
Have you ever try to modify an headphone?
If you try you will improve it if you made the right changes..I modify my 7 headphones with success...
But at the end a room can deliver what most shell would never deliver : more lifelike experience of music in a real non confined space filling the room not filling the head...And the intimacy of headphone sound can even be reach in a room ... I did it...
Yes it is a question of tastes and needs... But it is also a question of experience and experiments... At the end any room could beat all headphones IF acoustically well controlled...IF not it is a matter of taste and convenience for sure... Most people dont have a dedicated room to begin with and to do experiments with it...
This is my point ...
Ok i apologize and will mute myself now.... 😊
My deepest respect to you frogman...