plenty of agencies are looking at TRBO/DMR and Nexedge because it is affordable digital. Truth is, if you are REPLACING existing legacy wideband only analog radios and infrastructure, DMR/Nexedge doesn't cost more than comparably priced mid to high tier analog radios, in some cases it's actually less.
The NX300 is an example. Same analog only equivalent is the TK-2180/3180, actually costs more. Same with repeaters. There is no requirement to run them in the digital domain.
Narrowband digital does in some cases, outperform narrowband analog in fringe areas. No static, multipath, and encryption does not cost much more if anything (standard on Hytera DMR radios, software encryption is just a mouse click and enter your desired keys in CPS) and doesn't degrade DAQ like the old days.
The sucker factor comes in where perfectly functional narrowband capable radios and infrastructure get replaced at the direction of salesmen who want to make a big ticket versus a small contract on a narrowband job. It's the difference between a few grand for a mostly labor only job of reprogramming and tuning versus an outright big ticket sale of a new system. It isn't the radio sales guys' fault, blame the uneducated customer with a fat wallet who writes a blank check and asks no questions. This is where a good independent "think tank" of radio knowledgeable people could be effective. Hams would be great if they were interested, but my experience has taught me most are too involved with other things to care- until their scanners fall silent in some cases.
Scanning as we know it is changing. Enjoy it while we can.