For me, there are three main reasons to build modules instead a home layout: Space, flexibility and they are achievable.
In August 2018 a group of five brave members of the FREMO americaN group travelled from Germany to Sweden. We met just north of Hamburg and continued together with a transporter and a minibus.
July 2019 in Delmenhorst, Germany. It was one of the warmest days of the year some maniacs had no better idea than setting up a modular layout for the weekend.