I started in N scale in the early 70's after getting out of the service. As a teenager, I was into HO, but due to the fact that I was living in an apartment in southern Florida, a small N scale layout was all that I had room for. The layout was small enough thet it could be slid underneath a bed and be out of sight.
In the mid 70's, I moved mack home to Montana and built a house WITH A BASEMENT. Starting with my small layout, it was incorporated into a rather good size layout that has about 16 scale miles of main line alone, with a few branch lines off of the main line. All was not well back then. Compared to todays N scale locomotives, what was available back then is what I would call crude just to be polite. With the exception of a couple of Trix switchers, locomotive performance had a lot to be desired. I also wanted to model the area I now live in in the transition era. Not going to happen in N scale. The selection of Locomotives and road names was miserable, and the thought of trying to custom paint in N scale was a bit more than I wanted to attempt, even if I could find the proper locomotives.
I had a good friend, the late Pete Ellis near Cascade , MT who had a fantastic HO scale layout. It reminded me of John Allens G & D railroad which I had the opportunity to have operated on a number of times in the late 60's. The die was cast. The N scale was ripped out and my present HO scale layout got put into the planning stages. I did finally realize that trying to model even part of a subdivision of the Northern Pacific or the Milwaukee Road was not going to fit in the space I had available. The decision was made to freelance, and to connect to both of these railroads. As a kid, I had spent a lot of time riding in the cabs of both railroads.
Construction began. I started off handlaying code 70 rail and turnouts. Being that my railroad was a short line railroad, the lighter rail would be better suited for what I wanted to do. A bit of a mistake, but things worked out in the end. Things were moving along for a few years but then I got to the point where I was to the point that everything I was interested in had to be special ordered, as what we had for a local hobby shop stocked the bare basics. In time the hobby shop closed, and I was sitting out in the dark.
Thankfully, in recent years, e-retailers come on scene and I was able to get moving again. Shinohara code 70 track and turnouts were readily available, along with so many other items that were not available a few years earlier.
Jump to today, I find myself in my 60's, and also find that the old eyeballs aren't quite what they used to be. The move to the larger scale was a good decision for me. I also like the additional detail that can be had in HO scale.
I don't want to sound snooty to N scale. Compared to what was available when I started my N scale layout is like day and night. The new N scale locomotives run almost as good as HO scale, and the availability of locomotive types and roadnames is fantastic. If they were available back years ago, I would probably still be in N scale, but just grumbling that it's hard to see them.
I guess that's why there are different scales. A lot of people don't have the room I currently have and tradeoffs have to be made. My decision just happened to work out for me.