.NET 8 (LTS) and .NET 9 (STS) reach end of support on the same day: November 10, 2026. Why the support-model math collided, what actually stops, and why .NET 10 is the only forward target.
Originally published at endoflife.ai.
Here's a date collision that surprises people: .NET 8 and .NET 9 reach end of support on the same day — November 10, 2026.
The instinctive reaction is "but 8 is the LTS!" — and that's exactly the trap. LTS doesn't mean long, it means longer. The math:
.NET 8 (LTS): released November 2023, supported 3 years → dies November 10, 2026
.NET 9 (STS): released November 2024, supported 2 years → dies November 10, 2026
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