With the absolute greatest respect to everyone, I'm wondering why people with sufficient space are still seemingly designing and building model railroad track plans that are one huge jumble of track. This seems to be especially true in our, "O" scale. If one is designing a large yard that is understandable. However, real trains actually go somewhere not just endlessly chasing their tails in the same direction on the same circuit of track; more like a roller coaster. It is possibly even in smaller spaces to design backdrops/scenery (and track-work) in such a manner as to act as a view block where a person would need to actually physically move to see a particular area on a small layout. The view block helps to give the visual impression that a train is not chasing its tail.
I greatly prefer to physically connect all track on a layout and not have separate loops of track. Sooner or later, the operator of a separated track set-up will want another train on a particular track and will have to physically move the train by hand from one track to the other. Why would one design a track like that; less a trolley line or some other special feature such as a narrow gauge line?
I'm not bashing those that have Spaghetti Bowl layouts with or without separate loops of track. I have seen many layouts that are awesome! However, I am respectfully suggesting that future track planners/designers seriously consider developing a track plan that will take the train from point A to point B. I have seen this accomplished very nicely on a very few layouts, both large and small, but far too few.
More track does not mean a better layout. If you are new to this hobby you will soon discover that watching/operating a train over a continuous loop of track with no option to turn it around or connect it with other separated loops of track will make you bored relatively swiftly.
Our fellow model railroaders in the "other" scales seem to be a step ahead of us when it comes to spaghetti v. linear. Our scale is still considered as predominately "toy trains" by others, but recent history has seen more modelers in our scale embrace the more realistic linear design concept. I hope that it continues because there are absolutely awesome outstanding layouts that could be greatly enhanced by a more realistic track design.
Please consider more realistic linear design options for future operating interest and realism for future layouts. What do you think?