I wonder if Canada's interest in model/toy trains is in proportion to the number of real train lines/names it had back in the 40's, 50's, & 60's. Did Canada have as many RR companies servicing as many industries, such as steel, as the USA did?
My point is that there were so many railroads crisscrossing the USA, servicing immigration, industry, and re-settlement of people from the East that many people became quite enamored of trains because they saw and used them so often in and around their cities and farms.
I am from the Pittsburgh, PA area, and we saw real trains every where, every day, throughout our lives during those decades, which included numerous road names, such as B&O; P≤ PRR; C&O; Erie; Lackawanna; Erie Lackawanna; New York Central, etc. moving around us all the time.
It was that intimate viewing of real trains that inspired my interest in toy trains, I theorize. For example, my father worked in the steel mill in McKeesport, PA, and a rail line cut directly and diagonally right through the main shopping district, serving the steel mill. When you shopped on its main-drag, you timed your visits to various sections of that avenue according to when you knew a train would pass into or out of the National Tube U.S.Steel works, trains which often sat still for quite a while, totally blocking pedestrian and vehicular traffic for as long as they pleased, which meant we kids could reach right out and touch steam locomotives, for example, with and under the blessing of careful parents.
Here are those tracks, with a train headed directly into the mill...We used to lean on that railing on the right, ...separating the tracks from the sidewalk. The bus is on the main avenue for shopping, in those days.
Such omnipresence of real-life trains was typical of all the towns up and down the Youghiogheny, Allegheny, Monongahela, and Ohio rivers, which is only one part of the story of trains in the USA. We children, now model train hobbyists, loved seeing trains and being able to touch them, so getting our hands on toy trains seemed as natural as picking up a bat to play baseball.
Perhaps this may be relevant to the answer to your question. However, I have no concept of how much a presence in daily life real trains were in Canada.
FrankM.