I dream of the line from Buffalo to Chicago on the LSL route developing into a busy corridor like frequency...a nice start would be to extend all NYP-BUF trains on to Chicago...
This gets to the point that (I believe) Neroden has made on more than one occasion - that the LSL, more than most LD trains, really is a series of partially overlapping corridors along the entire route. Most LD trains have at least a portion of the route where an overlap of relatively fast, frequent corridor trains may not really make sense, but that is not really the case with the LSL.
Why, yes, thank you
The LSL is the most heavily "overlapping corridors" of the so-called long-distance trains.
However, all of the Silver Service, the Crescent, and the City of New Orleans have the same structure of overlapping-all-the-way corridors to a lesser extent; they have problems due to low ridership, low awareness, and lack of public transportation connections in the Deep South.
The "definitely not populated enough zones" (not worth corridor service) for the other trains are:
Coast Starlight between Eugene and Sacramento
Empire Builder from roughly Minneapolis to roughly Spokane
California Zephyr from Reno to Salt Lake
Southwest Chief from Newton to Albuquerque and again from Albuquerque until the outskirts of LA
Sunset Limited from Palm Springs to Phoenix, Tucson to El Paso, El Paso to San Antonio, *and* San Antonio to Houston
Capitol Limited from Pittsburgh to Harper's Ferry