There is a logical reason for that. In spite of what many believe, there actually are a few jobs that can be done more effectively with a 70 year old, 2wd, manual steer, non-loader equipped, gear trandmission gasser than a modern CUT.
Two that I can think of right off the bat, is operating my 2 x 12 plow, and my 2-row corn planter. My modern, 4wd CUT, lacks hydraulic draft control, so unless mud is an issue, I will always pick the old 8n for use on that. It certainly don't hurt that that is the implement that tractor was designed around.
The little corn planter is also much easier to use on that low platform, quiet, easy on/off from either side, antique Ford than it is with my modern, significantly larger CUT. The loader joystick prevents access from the right side on that, and it is over a foot higher to get on and off. It also takes a lot longer to attach the planter, because it is heavier and the clearance to the hitch pins is tighter.
Having a modern 4wd, diesel with a loader is handy, but having an antique in addition makes a lot of sense. That loader just blocks your view and takes up space for many jobs. It is great to have a tractor with one, and another without one.
It is almost a crime to destroy the near perfect balance of a Ford n by putting a loader on one. That is really the only reason I have 2 tractors. If i didn't need a loader for lots of jobs, i could get by fine with just the 1951 8n. One more big plus of the modern 4wd tractor is that it is far superior on a disk, saving lots of money on fuel. When it comes to the plow or planter though, I will take the antique most every time.