Microsoft has confirmed that it's working on important behind the scenes platform changes for Windows 11 that are expected to ship later this year. Today, the company began testing a new wave of builds in the Insider Dev Channel, which bumps the OS build number ahead of the current production builds and will be where underlying platform work takes place.
"Starting today, the Dev Channel is jumping ahead to receive 26300 series builds ... These 26300 series builds will contain many of the same features and improvements as the 26220 series builds that will continue to be released in the Beta Channel. Over time, we will be making behind-the-scenes platform changes in each build so they may have different known issues because of those changes."
