> To be fair, these are meant for datacenter applications where it would be absolutely normal to run your fans at full speed all of the time.
Case fans for rack mount chassis are very powerful, and also can take up a significant amount of energy when running full-bore (not to mention the mechanical wear).
I haven't used a server chassis in over a decade where the fans were running at full beyond a few brief seconds at startup. I'm not sure if they used a four-pin header or some other mechanism, but fan speed control is a normal and expected feature in server hardware.
> Does it have HTML5 remote console, and basic component diagnostics? If so what else would you like?
IPMI specifically is meant to be a standardized remote management interface. It (mostly) works for basic things, but more advanced functionality is hit-or-miss, or absent entirely, leaving you at the mercy of proprietary tools. Redfish is supposed to be better, although I personally haven't used it.
Web interfaces can be hit-or-miss in terms of functionality and UX. Additionally, I've often found these web interfaces to be unstable -- either being very slow or not loading at all, to certain features of the UI not loading data or hanging the interface.