It sounds like these beauties in Finland were also well insulated but they failed too. Why was that?
They did not failed! They lived their own life cycle in that time in those materials. After war were had even lack of nails when folks build new houses. Lots of material was recycled. Many built house from old timber material of from used bricks.
Migrative beekeeping is the basic of honey production. You move hives there where is the yield.
It may be that old stuff was abandoned when guys started use cars.
We are able to insulate what ever. That is not basic idea in beekeeping, never been.
Varroa sweeped away toykeepers and Lanstroth arrived instead. Many made their own insulated Langstroths.
We got too splended queens at that time and they cannot live in those old small cottages.
Typical insulated langstroth box is douple ply wall (boat ply) and for ecample glass wool or stone wool inside,( but never sheep wool!)
Here is typical self made or byed plyhive with insulations.