This should not receive a "highly recommended" award, I say, on the balance of things. This can serve in part to thank manufacturers for nasty decisions within their product's scope of function and competition.
To claim multimedia is the "only downgrade" may be factually accurate, it fails to address with enough gusto deficiencies -- many pointed out by community members here. For example, the review notes the capabilities of the new processor but forgets later Synology could easily have deployed 10GbE (or more realistically for cost, dual 2.5GbE ethernet ports). And that the nvme's are not only Synology brand locked but limited to a single lane is plain greed. In the [just] non-enterprise area the company has for years warned users they support only its in-house drives but doesn't lock them. It's buyer beware. But after being years late to the SSD storage pool breakfast, Synology insists here you can't choose your own condiments. That's after paying more for, then, arguably not as great a generational leap as could easily have occurred, especially given the competition on the hardware side. The missing multiple 10-gigabit USB ports and further proprietary 10GbE module choke the unit or pick pocket buyers.
If this was a GPU there'd be the devil to pay. Reviews would, as many not here, lambaste Synology for trotting this thing out notwithstanding the SMB benefits (but then again, if I'm a SMB I'm buying the 16/1821+ instead of this and maybe later a DX717 for expansion).
I'm a multiple Synology unit owner and DSM is one of the reasons for my particular use case. But if I were to need a new unit I'd be hard pressed not to look elsewhere, so not exactly mostly recommended.