Whatever you want to call it – floor (dt. Boden), carpet (dt. Teppich) or parquet (dt. Parkett) layout, it provides an alternative to a typical “above ground level” layout – be it modular or non-modular, permanent or mobile. You basically set it up on the floor, run your trains and pack up at the end of the day. The track configuration can vary each time. The advent of snap tracks such as Märklin/Trix C-tracks, Roco geoLine, Roco-Line with bedding. Fleischmann Profi-Tracks, Atlas True-Tracks, Bachmann Trains E-Z tracks. Kato Unitrack, etc. AND wireless app-based throttles made it possible to setup such layout without much space constraints.

In addition, some snap tracks such as Märklin/Trix C-tracks allow you to digitize (analog > digital) your turnouts and signals with all the wirings hidden from sight as I learned from Model Train Fun YouTube videos.

An idea worth considering.