Denon's is not an option for those who prefers no internal power amps in their preamp processors. SU/Masimo killed that option, knowing that all else being equal, Marantz AVPs would ensure a higher profit margin than Denon AVPs. If they were to let Denon launch an updated AVP-A1HDCI, it was $7,500 in 2008, with inflation and the much added newest features, licensing fees etc., they would have to list it for >$15,000, that would be Trinnov's territory.
With Marantz they avoided the otherwise huge cost jump at the time SU acquired D and M, because Marantz's flagship AVP in 2008 was the AV8003 that TLSGuy probably have it in storage, or garage, was listed for $2,600 (1/3 or Denon's), soaked and wet with their usual copper plates and extra shielding kind of typically audio hype features. The 2012 AV8801 was listed for $3,599, still less than half of the Denon AVP at the time.
So, you may be right about Marantz extra bs vs Denon's plain old engineering (such as dual end to end differential topology, profit is king, that killed Denon AVPs for good. I am surprised they haven't killed off Denon's high end PMA-SX series integrated amps yet but probably soon.
The irony is, SU/Masim picked the lower priced products of the two brands to be their premium line (i.e. Nexus vs Toyota), that sounds like a wise move on their part, again, from potential profit standpoint.