WoG on Technology link
TL; DR - Carros, rádios, televisão são vistos como superiores à magia.
Basicamente, o mundo dos bruxos não precisa da Tecnologia Muggle ...
While they have no need of mundane domestic objects such as
dishwashers or vacuum cleaners
A divisão também é cultural:
There is another reason for most wizards' avoidance of Muggle devices,
and that is cultural. The magical community prides itself on the fact
that it does not need the many (admittedly ingenious) devices that
Muggles have created to enable them to do what can be so easily done
by magic. To fill one's house with tumble dryers and telephones would
be seen as an admission of magical inadequacy.
A principal exceção é o carro e outros veículos:
There is one major exception to the general magical aversion to Muggle
technology, and that is the car (and, to a lesser extent, motorbikes
and trains).
porque
The magical community was forced to abandon horse-drawn vehicles when
they became glaringly outmoded. It is pointless to deny that
wizardkind looked with great envy upon the speedy and comfortable
automobiles that began filling the roads in the twentieth century, and
eventually even the Ministry of Magic bought a fleet of cars,
modifying them with various useful charms and enjoying them very much
indeed.
Eles também gostam de rádio e televisão:
...a few firebrand wizards even went so far, in the early eighties,
as to start a British Wizarding Broadcasting Corporation, in the hope
that they would be able to have their own television channel.
...many radios have been legally modified by the wizarding community
for their own use, which broadcast regular wizarding programmes.
Em conclusão; carros e rádios parecem ser as únicas invenções trouxas amplamente usadas que são superiores à magia .