Way ahead of ya. I swapped my built Discovery for a Jeep Patriot.
I do see a time when land mangers will be unable to meet our highly specific demands for off-road tracks. You have to admit, we want rough, but not too rough. Smooth, but not too smooth. Remote, but to your first point, please make it accessible to everyone. Tough to manage all of those specific wants with limited resources.
To your first point, there's no way to make every acre of public land accessible to everyone. I can easily jog down to the bottom of the Grand Canyon in a few hours, but I cannot climb to the top of Devil's Tower. Should there be a staircase to the top of DT to fit my particular inabilities to climb that rock? Should there be a tram to the bottom of the Grand Canyon, or should the Rubicon be paved for my Patriot? The argument that off-roads need to exist for the sake of public accessibility are futile. Where do you draw the line?
As we move forward, I do see a time when many off roads will close or become so improved they will stop being "off roads." As others have said countless times before, dedicated off road driving parks may be all that remains for genuine 4x4 fun. Not saying I look forward to those days, but I think that's what lies ahead. One thing is for sure, one appointment of one official of either inclination will not divert that future.