We have some relatives living an apartment (I think) a couple centuries old- I would guess from the early 1800s or 1700s, I have lived in multiple late 19th century and early 20th century apartments and all of them felt a lot more modern than that one. One weird thing is that there is only 1 sink in it, so if you go to the toilet you have to wash your hands in the kitchen sink afterwards.
Also only 1 toilet & there's no space for a dishwasher or some other modern appliances.
It looks nice but I would definitely prefer to live in a more modern apartment long-term.
Yep, that's another good example. Plumbing has always been an issue in the older houses I've been in mostly because it's next to impossible to change it.
Right, I do think you get diminishing returns once you get to "high end and well maintained early 20th or very late 19th century" buildings, a lot of these can accommodate more or less modern lifestyles quite well (albeit not all of them and they'd have to be renovated with stuff like adding elevators to 5-6 story buildings).
Also only 1 toilet & there's no space for a dishwasher or some other modern appliances.
It looks nice but I would definitely prefer to live in a more modern apartment long-term.