Some parts of advancing beyond just a train set, however small that step is, come from wanting to be more prototypical. As examples as even on my dealer style layout I used a green base, as green was used by Hornby, and there are no facing points other than for entering the slow lines, where there are the loops. The track plan for the goods area would be close to prototypical were it to be transposed to being a scenic layout.
The difference, for me, between a scenic train set and a basic intro level model railway starts with observation and application of ideas from the prototype. That can be either operational or through advanced modelling and scenery. The preserved (ex-L&Y?) signalling layout in the NRM is undoubtedly a model railway as is the Gainsborough club layout. Several suburb scenic layouts, therefore undoubtedly good models of a railway, are run just as roundy-roundy tail chasers. We are such a disparate church there is room for both.