In the same way I question the value of a lighted cabin at night from exterior view, when in reality it's not so realistic? My point here is not to insult you, but to make apparent that many people have different opinions.
Incorrect assumptions. Please don't go trying to compare other people or groups to another, especially from another sim. Free time is something none of the guys definitely have, and when they do, it's going to better priorities.
I used past tense, not present, so this question is way out of context.
Trying to project other peoples failures onto this team is not fair of you to do, so please don't. More importantly, I'd encourage you to do some research as to who the people on this team are and you'll perhaps quickly realize they are not prone to leave things behind.
There are methods within X-Plane to make it so such a cabin is not impacting resources when not in use/view. It's simply a matter of doing things right.
Never mind the fact that the 737 is already an extremely good performer FPS wise.
*for me (you).
As I said, in due time. This group does not skimp on the details when it's time to get something done. The dedication to this product has not changed, and if promises were made (as they previously have been), they'll get done.
Longish story short? The cabin lights will come proper when the cabin itself is done.