They are kind of an anomaly...like, why have 3 different modes? It's like they have the AWIN tg, which makes sense, the old analog VHF, which makes sense they'd keep it since it was already in place, but why invest in DMR and then rarely use it? It puzzles me that this is the case for Stone Co...but that's how they operate.
I suppose it could be that they are transitioning and hit a financing wall or something...maybe eventually it'll all be DMR but the coverage just isn't there right now or something.