Have made a complete backup, with the expectations of an update due today. Not that I will be taking the first opportunity to install it - I'll let the unofficial beta testers fault find first.
I had not made backup all my 6 devices and been installed 2004 on 6 devices since 14 May from created en-gb version iso used svf extractor from MyDigitalLife forum, the SHA-1 hash matched MSDN iso hash.
So far so good, no issues found. Night Light still worked since someone reported to me said it broken in 1903 Update and I send feedback to Microsoft and they fixed it in next cumulative update.
Had windows update on 23 May with KB4559309 that everybody will receive Edge update to replaced old Edge browser. Days later I realised Set these tabs aside icon is gone in new Edge and I panicked I cant find months worth of saved tabs aside I was too busy to read. Thankfully I googled it and found all is not lost, old Edge Set these tabs aside tabs is saved in Favourite. Noticed memory usage went down from 50% in old Edge to 21% in new Edge.
Impressive. Now waiting for new Nvidia driver with brand new WDDM 2.7 supported DirectX 12 Ultimate with DXR 1.1.