The Windows comparison
You can think of both Fedora and CentOS Stream as a way for Red Hat to get the community to test its products before release. It is similar in concept to Microsoft's Insider programme for Windows, and nearly as confusing. ®
I would have thought that Windows 10 was Microsoft following the Fedora model. Only with Fedora those using it know they're riding the crest of a wave whereas W10 forces untried and untested updates down my throat whether I want them or not.*
(* sorry just had another forced update which lost a load of work and buggered things up again)