Many inventions are still used today. A lot of them have been updated from their original version, but rest very similar all the same. For example: Television sets, computers, chairs, vehicles,...
Despite their many problems and odd behaviors, magnetic compasses are still part of every aircraft's instrument panel. Since they are not affected by power failure or any other type of system...
Yes, of course there's people that use them but i doubt there's alot There are many modified cave home throughout the world. They are comfortable with an ambient temperature of about 70 degrees year...