While it's not currently listed as such, within the last 30 days, I could SWEAR that the DMPS3-4K-350-C was listed as discontinued on Crestron's website or portal (can't remember which I was on)(yes the 3-Series 4K version). I could certainly be wrong, but I do seem to remember asking a coworker if he had seen any formal explicit correspondence about it (such as an e-mail blast), to which he hadn't.
I'd be a little nervous specifying a current DMPS into new projects, especially if a major change is coming to the DMPS line up, say, in the coming weeks, though this is nothing more than rumblings and speculation.
The vibe I get from Crestron is they want to sell the poorly designed and overpriced HD-PS stuff as a replacement to a DMPS. Much preferred the older "receiving" form factor over the current "transmitting" form factor, though if many of your inputs are at the table, it'll probably fit into the workflow just fine.