Use of building=villa?

Now you have to add support for yet another top-level feature to mean a variety of single-family building. In the meantime, any specific application support for the building=house will be missing.(That’s why I personally prefer building=house + house= )
Is =villa necessarily detached? What should be used for “residential building of representative character where architectural design is of prior rank to utility value” which are semi-detached or in a row? Building=villa?
How do you distinguish them from any rich people’s home? Is it supposed to be traditional, historic, or grand looking, not modern sleek? Because photos of the latter is what I see in search, not the German post examples.
Perhaps unrelatedly, I thought of historic=manor , which doesn’t have a specific building= for it now. Should they be historic=manor + building=villa , not building=manor ?
To get an idea of the possible variation and how vague this is, “In the early modern period, any comfortable detached house with a garden near a city or town was likely to be described as a villa; most survivals have now been engulfed by suburbia. In modern parlance, “villa” can refer to various types and sizes of residences, ranging from the suburban semi-detached double villa to, in some countries, especially around the Mediterranean, residences of above average size in the countryside.” Villa - Wikipedia
It seems mostly mass added in 2014, 2017, and 2021 osm tag history
The concentration is in Italy

I’m afraid some got the =villa simply with name=Villa *

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