Great input in this thread, including some helpful reminders about current conditions. Curiously, I think the demise of dual meets in *track* has had an impact on cross-country!
Of course the drop in scholarship numbers helped to doom the elite collegiate dual meet in track (man, I remember those epic UCLA/USC duals...); but something that affected more than just the elite/DI schedule was the adoption, by ~90% of American colleges and universities, of the early start/early finish academic calendar back in the 1970s and '80s. With terrible weather (at least in the Northeast) often a reality until mid-April, and conference meets in the first week of May, there simply isn't *time* to put together a decent dual/tri-meet track schedule anymore.
So emphasis in track and field shifted, from posting a winning regular-season record to performing well at the conference meet (perhaps) and Nationals. To get qualifying marks for Nationals, athletes often have to take expensive trips (can't afford too many of those!) to get decent weather conditions, and have to concentrate all their energy on doing a single event. Multiple events, to help the team score? Ridiculous--particularly because often there *isn't* a team score.
So in track, t&f/xc programs have already lost the focus on Ws and Ls. But how does this affect cross? Well, some coaches--particularly those with limited resources and/or abilities--saw that they could get away with concentrating all their cross-country/track scholarship monies on just a few events, often the distance events, and then justify finishing DFL in the conference *track* meet by pointing to how well they did in *xc*, where their distancemen would shine.
But that means they *have* to do well in cross-country: have to take "big" (i.e. expensive) trips, to meet teams from other regions; have to beat those teams, to improve the chances of being selected for Nationals; and hence have to peak for those few races *and* avoid losing other races. Dual or tri meets (where you might get beat, and where you'd use up travel $--with no championship at stake) just don't seem to fit that scenario.
To the coaches and ADs (who are already conditioned--by track--not to expect a regular-season tally of wins and losses), I suppose this all feels reasonable. But you know what? Kids--yes, even collegians--*like to race*. It's actually why most of them originally go out for the sport. (Did YOU go out for cross-country so you could race maybe once or twice a month?) And college teams demonstrated BITD that you could race (nearly) every week, with a schedule of mostly dual and tri meets (which are not so draining), and still build for outstanding performances at the end of the season. I think it was more fun, for the runners AND the rest of the student body, back then. You could feel like you were actually part of a school sport, and you could feel yourself improving as a runner and a racer and a team member every week.
Sorry for the lengthy and disjointed rant--don't have time to shorten it! One final point: A while back (must be 20-30 years ago now) a pretty solid study demonstrated that the DI teams who ran more 6M/10K races in the regular season tended to do better in the championships. So to see teams a) limiting the number of their races AND b) limiting the distances in the few races they DO run, just seems crazily counterproductive.