this is something i have not brought up thinking it would come back one day and eventually forgot about, until i found this old clip:
I kind of mess up and range too early which activated commander aim, but I think the video demonstrates my point pretty well.
I would like it if it was at least an option toggle commander sight being able to move freely in 3rd person view, specially because the BMP-1 (I’m guessing because its commander sight is hull mounted) still has this ‘feature’, and you can even see commander sights jiggling when you twitch around.
as for why it would even be useful? i mean it is quite clear, you get to scan an area with a thermal sight while the turret is still not on target, helps with reaction speed and such.