It makes me very sad seeing so many stone buildings left uninhabited and overgrown with plants when I visit Spain and Italy. I always thought it was just the cost to upgrade them to modern living standards that was prohibitive, but from personal experience [0] with similar situations in the US, I can see partial ownership being an even bigger problem.
[0] One set of my grandparents split their house equally among their 3 children. Because it has immense sentimental value to those children, they have not sold it and currently “rent” it at no cost to one of the children. Depending on the order in which those 3 children pass, the state of the house could easily become deadlocked for decades as I know one of my aunts would refuse to sell it even if the other aunt (who lives in it) passes. Thank god none of my cousins would want to live in it so we probably would eventually be able to sell it. It’s not even close to a mansion or anything… just a regular 1960s middle class house in an area where land is pretty cheap. If I had a shitton of cousins and the property was very valuable land I could totally envision it getting permanently deadlocked.