Microsoft announced earlier this week that its Windows 10 19H1/1903 release is poised to go to the Release Preview test ring and marinate for a month before it starts rolling out to the mainstream in May. That should mean that Microsoft also is about to start rolling out preview builds of the follow-on Windows 10 feature update, known as 19H2, to its Insider testers. But it’s looking like the testing story is more complicated than that.
