Yup, don't check your calendar, it's a Monday, but Microsoft has released a new build to the Windows Insider Beta Channel anyway. The build, 22621.160, brings File Explorer tabs, which just were released to only a subset of Windows Insiders in the Dev Channel last week, and some navigation updates to the Beta Channel.
File Explorer Tabs, just as in the Dev Channel, are rolling out and not available to all Beta Channel Insiders "as we plan to monitor feedback and see how it lands before pushing it out to everyone." Interestingly, this raises at least the possibility that some Beta Channel Insiders could actually get File Explorer Tabs *before* some Dev Channel Insiders get the new feature, even further convoluting the meanings of Dev and Beta Channels. Oh well.
If you're a Beta Channel Insider, download the update now and let us know if you received access to File Explorer Tabs, and what you think of them! By the way, don't forget to check out our hands on video with File Tab Explorer!