A major update to Microsoft Windows 10 that was expected later this year has been pushed into 2017, according to recent reports.

The release, known by the code name Redstone, has been delayed, according to tech news sites Winbeta and ZDnet. The operating system update, which would support new devices including HoloLens, was expected to roll out in two phases in the summer and fall of 2016, The Verge, reported last April.

Microsoft msft had no comment on these reports.

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In the shorter term, Microsoft continues to provide early release (and more incremental) updates to Windows 10 to members of its “Windows Insider” program who want to give the software up-close-and-personal scrutiny.

The latest build, 14279, arrived last week with new Spanish, Portuguese and French language support and other improvements for the to the Cortana voice-activated personal assistant (and Apple aapl Siri rival), according to a Microsoft blog post. The posting also warned of potential issues including the fact that the update has caused screens on some Surface Book and Surface Pro devices to freeze.

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This sort of news illustrates that big operating system releases remain hostage to the same cycle of updates-bug-fixes-and-delays that the industry has dealt with for the last 30 years or more.

Note: This post was updated at 3:45 p.m. EST to reflect that Microsoft had no comment on reports of Redstone delay.