That's actually large by many standards across the world but also for older urban dwellings in US cities. I suspect those 2600+ ft^2 numbers are average sizes for new construction?

For whatever reason, new construction of single family homes consists almost entirely of structural wood framing and plywood, then tyvek and non-structural brick facade. That kind of construction makes building larger volumes feasible. I don't know when the change-over in the USA from structural brick to wood occured, but I suspect it was in the 50-60's. In old urban neighborhoods in the North East, 2500+ ft^2 is definitely considered "big".

Unfortunately, I doubt that modern wood frame homes will last 100+ years without serious interventions. Brick also deteriorates, but more slowly and it's possible to work on it piecemeal.

Unless you have a specific need for more space (maybe a workshop, etc) I would avoid the bigger sized houses.

For apartments, the average size is 941 sqft, which is down about 5% over the last 10 years.

That blackish blob in Europe is the Netherlands.