The truth is that I had never noticed these details, but now that I remember, I do remember having seen them in some houses in the colonial area of my state and I agree with you that they give a lot of character to the house where they are placed.
On the other hand, I think that currently this would not be used because both architecture and design in general, have taken a more minimalist path, is my perception, however I think there are things that should be rescued.
I'm sure you have some around, I think there must not be many left but they are all over the country. And it is as you say, in today's architecture decorative elements are not usually used, thank you very much for stopping by and commenting! Greetings 😊