Build 21277 is out as an Optional Update

Believe you are correct. Seems to be the MS way, all or nothing. Similar to the blurry login issue that they still will not deal with properly. (gpedit on pro, registry edit for home).

Hey Johnny, Pauli says the same thing about the blur effect and I have Home edition on 3 laptops and I have never had to do a regedit to not have the blur effect at log in. I just turn off Transparency in Settings Personalization. I realize this means I have no blur or Transparency effect anywhere but I don't care for the effect anyway.

when you open the window it get a fade/bloom/macos effect

 Weird, I have 3 different machines at 21277.1000, I don't see this on any of the 3. 😊

I don't see the animation either FG, no big deal.

And 

It is very pronounced in my PC. It is as if a big meteor is coming on to me when I open a window. Any window, such as a folder window or System Properties window.

I guess you belong to the "chosen" subset of users 😉

As a consolation prize I have the new emoji picker :-)  

I don't see it either but my folders and files open in an instant

when you open the window it get a fade/bloom/macos effect

 Weird, I have 3 different machines at 21277.1000, I don't see this on any of the 3. 😊

I don't see the animation either FG, no big deal.

And 

It is very pronounced in my PC. It is as if a big meteor is coming on to me when I open a window. Any window, such as a folder window or System Properties window.

Hi fg,

Have never agreed with or appreciated this supposed A/B testing. It only forces one to enable the feature by other means if desired. It actually divides Insiders to have's, those that get around it, and not have's.

Makes sense, doesn't it

In the old days, before MS even existed, they used to say: "We do it to confuse the Russians"  !