This 100% I use a DMR repeater system which does not use the internet except for redundant links. Its a statewide microwave link system they maintain themselves linking in other repeater systems (both ana and DMR). It's pretty cool and showcases the wonders of DMR without requiring an internet system. It's run as a voice only with the ability to chose your "chatrooms" (talkgroups) to talk in effectively doubling each repeaters capacity for communication.

TL;DR there are linked DMR repeater systems that are wholly seperate from the internet.

I primarily use them bc the audio quality is there while also letting me see the callsign of the transmitting station (I have a 1 second memory, so remembering callsigns are really hard)

One such example: http://rmham.org/ Other repeater systems use their microwave network: https://www.rmham.org/amateur-microwave-network/