It's been a while since Microsoft released a new Windows 10 build to the Slow ring, but today, the company released build 17115. It's the first one to arrive since build 17074.1002 showed up on January 19, and it's only the third Redstone 4 build in the Slow ring at all.
If you're on the Slow ring, you're about to get a ton of new features, being that there have been so many Fast ring builds since 17074. There are new Font settings in the Settings app, replacing the Control Panel functionality, and you can now download new fonts from the Microsoft Store. Quiet Hours is now Focus Assist, and that includes some new features as well, such as the ability to switch between three modes from the Action Center. And of course, there are other improvements across the board, including the Shell, Settings, Windows Update, HDR video playback, and much more.
You can find full changelogs for the builds you missed at the following links:
It's also worth noting that there are currently no known issues with Windows 10 build 17115.
Hopefully, Microsoft will publish new ISOs for build 17115. ISOs typically only get published for Slow ring builds, but due to an issue, there were never any published for build 17074. That means that the current Insider ISO is 17025, and it's over four months old. It's also the only Redstone 4 ISO that was ever published, despite the update being weeks away from being finalized.