Actually yes. The standard is ten years from when the version is released, compared to Google's six. RHEL 7 (for example) was released in 2014 requiring 2GB, so people could indeed still have RHEL on such a system with two years of support left to go.

> RHEL is also frozen

Untrue. It doesn't move fast, to be sure, but it does get updated. Source: I used to be in the RHEL team.

> And BTW, are you willing to pay > $200 per year for chromeOS

I paid Google $1600 for the machine itself. The OS was bundled with the machine. It worked out to more than $200 per year. Please do some more research before cross-examining others - or, since the guidelines preclude that, just don't.