Hi, M. What does the woodwork in a house built in 2000 look like? You will find a lot of variation from tract built, low end houses to mansions. The same holds true today. And basically there is no difference between the moldings that were used then to the ones used today.
About the only thing going on then was that home building was slow during the war years. After the war, many that were in the military could buy houses under the GI Bill so there were a lot of small houses built. Bypass doors for closets were common versus the bi-fold doors that we see today. Wood was more available so moldings were stain grade pine versus the finger jointed, paint grade that is available now but it was still painted.