Zscaler public preview

Hello, community

Zscaler sometimes execute upgrade.
It is great, however as you know, upgrade accompanies terrible user experience.
I am not sure, are there any public previews like below?

These are upgrades list!
Here is the public preview link.
Before production deployment, please check it with your test accounts.

I had a terrible experience in upgrade 6.0 as an administrator because some features are not disclosed beforehand…
It may be not a deal for Zscaler, however, life cannot be expected for all.
Are there not public preview(i use Azure’s term) of Zscaler?

Regards,
Muhammad

Your account team may be able to give access to the Beta cloud to test these types of upgrades.