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Note that you can use the Tor daemon as a normal DNS via UDP server and it will resolve your DNS requests over the network for you.

Maybe I'm wrong, but it seems similar to I2P where if you want "UDP", you'd need bespoke plugins/transports/whatever for each application.

Thank you, therefore my first impression seems right: without any provision for UDP this isn't an easy-to-setup and transparent way for any user to preserve his/her privacy.

As always this will depend on your definition for "any user".

Users who try to do a lot of UDP traffic will have to change their habits, yes. But a majority of users who don't know a lot about computers rarely do anything on a PC that isn't driven by the browser anyway.

But at least the users who try to use UDP won't wind up specifically leaking info, just wind up slightly confused why certain things aren't working.

UDP wouldn't route?..

The TOR protocol does not natively support UDP, though there are workarounds[0]

[0]: https://www.whonix.org/wiki/Tunnel_UDP_over_Tor

Yes.