As others have noted, there were more trains. The PC had a separate "East/West timetable" to list all of the many trains that still ran between the East and Chicago, St. Louis, Cincinnati etc. Although some of them had been requested for discontinuance and were running under court order. For example there were still 2 Philadelphia - Pittsbugh trains (Duquesne and Juniata) and multiple Chicago trains, not just the Broadway. There were oddities such as Harrisburg - Buffalo, that ran on alternate days. It was great for railfans, probably not so much for people actually trying to travel somewhere. Many trains even long distance were down to coaches and head end only.
In the NEC, some trains Boston - NY still had real dining cars, although service and availability of items could be spotty (I recall ordering scrambled eggs on a morning train just out of Boston and being informed they had "run out of eggs").
It was a great time to be a rail fan, there were more long distance trains with through equipment from exotic sounding railroads (for a New Englander) such as RF&P, Southern, SAL, ACL, etc. Then again, riding a clocker in a couple dirty P70 coaches on a dreary winter's day got you thinking maybe the bus would have been better.
Jon
Courage is not the absence of fear; it is the determination that some things are more important than fear.