alt Hacker NewsSupporting anything for 8 years is a huge commitment. That means 8 concurrent versions needing at least some work all the time.
I think Microsoft regretted those long (10 years) support guarantees they had for .net framework. In the end, it probably slows you down in terms of innovating
Given .NET's release cadence, 7-8 years of LTS would mean 5 concurrent versions: 1 STS release and 4 LTS releases. This is still a lot of old versions to keep updating, of course.
Anyway, the critique was less about the exact length of LTS, and more about the lack of significant difference between LTS and STS.