It is strange to me that HK is still making so many USP's. I'm still very fond of my USP45 and I'd love to have a USP9C or USP40C, but not at today's used prices. I can't imagine spending the ~$1000 it takes to buy a new one these days.
But at the same time, I have an HK USP40 project gun that's turning into something absolutely silly in a real hurry, so I'm not sure I have 'room to talk' in that regard.
HK throwing their hat into the G43/P365/Hellcat ring would be a very interesting gun, and I agree that it's more likely to be a downsized VP9-esque striker gun if it ever comes around.
Meanwhile, my HK45C disappears quite nicely in my JMCK holster and I don't really find myself pining for a tiny HK 9mm since my tiny G43 just sits in the safe unused.