[cf141q5325]

>Given the super low price of smaller window A/C units, you'd think they'd install a few more of those, maybe it's impractical for some reason.

In Europe you generally have another kind of window, which you tilt.

https://www.bew24-fenster.de/media/catalog/category/Kat_Kuns...

https://www.plejadium.de/wp-content/uploads/2019/06/kippfens...

Given the construction, you cant conveniently seal an AC in there. Due to the houses being made from stone, you cant easily replace the type of windows. People also generally rent in the cities, so you would have to convince your landlord to let you screw with his outer wall, which is a big no no. Some countries like Germany also dont allow renters to change the outer appearance of a house. This mostly means no satellite dishes hung out of the window, but also no bulky ACs.