I am running OS 1903 on my desktop and after a few adjustments, mostly dealing with Microsoft Security, I have arrived at a good performing DAW with Cubase10. I ran the LatencyMon for almost 4 hours after putting things into Airplane mode, another issue, IMO. (The Airplane mode is basically turning Wi-Fi off temporarily, but not the same as being completely disconnected from an internet connection.) I think this is key to getting better latency numbers because - again, IMO - Microsoft has created Win10 with a different end user in mind, not an offline DAW user per se.
I have read posts on the forum that speak badly of the 1903 update and I think these complaints are not based on a good PC set up. Anyway, here’s a screenshot of my 3+ hour runtime in LatencyMon with the app set to the default ‘Interrupt to DPC latency’. No, I’m not trying to establish myself as a 1903 poster boy. What I want is for ppl to quit complaining about Win10 1903 because there’s nothing wrong with it. Like with any DAW OS, it’s just setting things up.