Nobody said posting the list of other manufacturers also not recommending updating absolves us of providing updated drivers - that was a point to illustrate that the industry as a whole has not yet completed the task of migrating to the latest OS. Just because Apple says there's a new OS coming doesn't mean everyone will be ready on day one, even if we had been working on compatibility during the beta (and who's to say we weren't?)
You're welcome to move to another brand, but don't be surprised when Denon says the same thing about updating. Rane too. And if you're planning on using that hardware with Serato, you'll want to read this as well.
We're all in the same boat, so your patience is appreciated.