[m4rtink]

Maybe its region specific ? There is a brand 270 sqare meter new train layout based on Vienna in Prater, Vienna: https://www.praterwien.com/en/attractions/details/kingdom-of...

And its just a branch of another big layout in Prague: https://www.kralovstvi-zeleznic.cz/en/

Also I know a few people who are into model train and I would not call them old. Also they use quite modern tech (resin 3D priters and fully automated train control).

As for the space issue, they even sorta sved that as well via modular layouts - you build a certain part of a layout that conforms to an interface spec (rail placement at edges, electrical connections) and then you can join other enthusiasts at events where they build massive layouts from these modules in a rented hall somewhere for a couple days.