Some Members wish to partcipate whilst others will prefer to wait for the stable release, Samsung does need some Beta testers for the older Devices. The stable starts rolling out in September but obviously the S25 series is the first in line.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
Maybe so but they've left it very late if the stable version is due quite soon now if the reports on Sammobile.com claim it will be in September and most other tech sites take the same reason.