I'd also like to add that scanning on digital is a waste of efforts. DMR put on the radio in promiscuous mode. D-Star, you are stuck with the current reflector, u mess you change it, no scanning required. No point in jumping around repeaters, they all are on the same base TG, or the one you key up (for 10 minutes).
The scanning I do is on the analog channels. I like to monitor the local FRS/GMRS channels, the 5 MURS channels and a collection of business only VHF and UHF frequencies. Most of the public safety stuff has moved to 800 MHz P25 with encryption. There are still a few around that are still on 450 MHz to 470 MHz analog systems.
There are a few business that are using DMR, thus the D878UV radio, locally but they are rather few in number currently.
The only DMR radios I have are the Anytone D878UV and the Kenwood TH-D340U. The Kenwood I got off eBay for $45 before somebody else saw it and made the purchase. Radios like these don't last long selling that cheap. I guess the seller didn't know exactly what he had. Some of these guys buy surplus equipment in bulk and sell it off for what they can get for a quick buck. I also snagged a Kenwood NX-340U with the rare 400 MHz to 470MHz band split, perfect for Ham Radio, for $50 the same way. Haven't seen deals this good since then. The few I've seen since then sell for $125 and up for the base models.
Both radios will do analog/digital on a per memory channel basis. The brochures say the radios won't do normal FM for the US models. Get the right version of the programming software and license key they will. It's a limitation of the radio programming software, not the radio's hardware or firmware that I can see.
There are pockets of NXDN activity.
From the little I've read NXDN and DMR both employ similar ideas, talk groups etc., for communication, but use different modulation/signaling formats and narrow bandwidths. I know this thread is about DMR, however NXDN will work in a 6.25KHz bandwidth and DMR using 12.5KHz bandwidth. That has the potential to expand the number of usable "channels" without using more spectrum. Some of the existing 25KHz channels could be split into 2 or more digital only channels.
The most intriguing thing about DMR is the SFR, single frequency repeater, mode where one can build a repeater using just one frequency in place of a pair. That eliminates the trouble and cost of a set of tuned cavity filters.