Google launched its Googlebooks platform — an Android-based laptop and tablet line — a week ago, immediately raising questions about what happens to the existing Chrome OS ecosystem. The answer, buried in a support document, is blunt: all Chromebook devices stop receiving updates and security patches by mid-2034. For any Chromebook bought today whose 10-year lifecycle would extend past that date, Google offers only a vague promise of migration to Googlebook OS. This is a straightforward broken promise. Google committed to 10 years of updates for every Chromebook. A device purchased in 2025 should receive updates through 2035. Instead, Google has imposed a hard ceiling: mid-2034, regardless of purchase date. The closer you get to that wall, the worse the deal gets. A Chromebook bought in 2030 would receive roughly four years of support instead of ten. Google's mitigation is thin. The company states that "many newer commercial Chromebook models will be capable of upgrading to Googlebook OS," but the qualifier "many" does significant work in that sentence. There is no commitment that all devices will migrate, no technical specifics on what "qualifying" means, and no guarantee that Googlebook OS will itself survive Google's well-documented history of killing products. The institutional buyers who matter most here are schools. Chromebooks dominate the U.S. K-12 education market precisely because of their managed lifecycle promises — IT departments plan hardware refreshes around guaranteed update windows. Google acknowledges this indirectly: Chromebooks will continue to be available specifically because Googlebook OS lacks the management frameworks that education and enterprise markets require. The transition timeline is entirely in Google's hands. The deeper pattern is familiar. A platform builds market share on explicit durability promises, then retroactively shortens those commitments once the installed base is locked in and switching costs are high. Schools that purchased fleets of Chromebooks based on a 10-year guarantee now face an involuntary platform transition to an OS with no track record in their environment. As OSnews editor Thom Holwerda notes plainly: "We live in a world where corporations are free to make and break whatever promises they want virtually free of consequences." The legal and regulatory landscape offers essentially no recourse for institutional buyers who made purchasing decisions based on Google's published support commitments. The promise was the product, and the promise has been revoked. The uncertainty compounds. Googlebook OS could be the next Pixel Slate, the next Stadia, the next Google+. Google's abandonment rate for hardware and platform initiatives is not a fringe concern — it is a documented pattern. Schools and enterprises are being asked to trust that the replacement for the product whose promise was just broken will itself be kept.