Yeah, Not sure how DMR is competing for space with public safety.
Much of the current public safety is going or on 700/800 trunking systems. Not everyone, but I would say that it's now a majority.
As far as DMR for ARES/EMCOMM.
It's really a double edged sword. On one hand if you have a group doing a specific function, it's almost a private channel because the radios are a bit different and every ham doesn't have one yet. So weather nets will typically have less fair weather reports. Problem is that joe average is not going to have a DMR radio. So when he's getting reportable weather, you may not get to hear about it.
For emergency service, ARES and EMCOMM. Again special communications paths. Consider it legal encryption. It's like using 900 or 220, no one has gear. So it's sudo private due to obscurity. But again, your main line traffic needs to be FM. That way if you have people wanting to report things, check in to a net, or provide assistance, then they can.