P25 and DMR. The end.
D-Star costs too much, has no analog compatibility mode, and no matter how much people yammer about it not being proprietary, every D-Star radio says Icom on it.
System Fusion has those same problems, plus being way late to the party.
P25 has been around long enough that commercial surplus gear is getting affordable, and brand-new DMR equipment costs like good-quality analog ham gear.
Neither system is proprietary, and both have extensive multi-manufacturer support.
Honestly, I don't think I will ever buy another ham FM rig anyway. They're fiddly. They have too many buttons to access too many features that most folks never use (when's the last time you used ARTS or crossband repeat on an HT?). They're delicate. They don't have half the accessory support (compared to Motorola, at least). They're all tiny now, which is a pain for those of us with big hands and means they dissipate PA heat poorly.
The first generation of ham FM gear was mostly commercial surplus, and it stayed that way for a while. Why shouldn't we stick that model for the first generation of digital? The kinks have already been worked out, in environments more trying and with higher stakes than most hams will ever need to worry about.
Maybe you should buy an icom d-star radio or system fusion radio because you'd find out they do have analog compatibility.
P25 gear may be getting affordable (I haven't noticed), but the infrastructure remains high. Just because you can buy an old XTS3000 for $100, doesn't mean there's a repeater to use it on. A quantar still costs an arm and a leg and as a result, there's not many of them on the ham bands. Nowhere near as many as there are for d-star. And I have yet to come across and P25 linked repeater network. So if you like talking to yourself, P25 is splendid. I'm speaking from actual experience as I have owned radios for all the digital voice modes.
Multi-manufacturer support? I'm not sure what you mean by that. If you're talking about compatibility across brands, well at the end of the day, what it boils down to is, "Do you want to talk to other people or do you want to talk to yourself?" I live in a city with 6 million people. We have ONE, that's it, p25 repeater that has excellent coverage. It's dead quiet. In digital that is. We have 2 DMR repeaters that are also dead on the local talkgroups.
D-star expensive?
You can buy a brand new d-star radio for $289. I'd love to know what DMR radio or P25 radio you can buy new, with warranty for $289 or less.
I'm very sorry that you've never found a use for crossband repeat or ARTs. ARTS is not just on their ham radios by the way. It's also available on their commercial LMR line. And they've improved it. Now there's ARTS II. So I guess you like the no-buttons approach that seems to be popular amongst i-phone users. If you don't like having buttons on your radio, you should really look into D-star. The ID-5100 has only one button on the face of the radio and that's just to turn it on and off.
Just because a radio is tiny doesn't mean it dissipates heat poorly. But I think what you meant to say is "they just don't look enough like the po-leece." and that would definitely a valid point. There's a lot of whackers out there and they want to look like the cops and that requires a Motolola P25 radio. Just remember, that all those phase 1 surplus radios that are coming down are going to look like old police radios now that the cops are going to something that looks completely different. Would you rather be the guy with the pocket-friendly ham radio with all the buttons on it or the guy who shows up with his 15 year old fossil that no public safety agency uses anymore? Just look at the people who walk around with their giant astro sabers and tell me that's cutting edge.
And those older p25 radios sound like crap on digital. If there was more than just yourself to talk to on P25, I suppose someone on the other end would have told you what your audio sounds like.
As far as the first generation of ham gear being commercial surplus, that might have been the second generation of ham gear. The first generation, you had to build yourself. Are you sure that's the generation you want to stick with? It really sounds like you want to stick with the old technologies and not move forward but lots of hams like to try new things and not be stuck with some out-dated, obsolete, featureless technology that offers very few benefits.
And when it comes to the size of buttons, the buttons on my LMR radios are the same size as they are on my ham radios. In fact, on a couple they are actually smaller. It sounds like you have a disability that prevents you from using your radios and should consider a prosthetic finger extension to enable you to press the buttons. Or if your insurance won't cover it, you could try taking a golf pencil and taping it to one of your fingers with masking tape. Yet another reason to switch the newer generation of radios, because they've made changes to accommodate those with that very same disability.
Methinks you need to spend some more time trying the other digital voice modes and not be so set in your ways. You'll like what you'll find.