No travel time. Most Finnish houses have a sauna built in.

And Swedish houses, particularly detached houses built or renovated the 70s. Typically used for storing boxes.

That is growing trend in Finland too. GenX and younger seemingly use less sauna compared to older generations.

Thus when it was common to build sauna for a while all new all least family size apparments late -80's and -90's that has been less common later decades. And it's become so common people not using saunas already built bathing and instead use it additional storage. Which has unfortunately caused even some fire accidents if stove circuit breaker was not disconnected. Last year we had this kind of happening when child apparently had played with the sauna timer switch and activated it.