Earlier quoted context omitted.
In practice, full, stable hardware compatibility and battery life. The Linux experience on the Framework Laptop on recent distros (e.g. Ubuntu 22.04.1) is solid, but battery life will still generally be better running Ubuntu on top of ChromeOS.
Interesting. Do we have a concrete reason why, e.g., TLP[0] falls short of the power management features offered on other OSes? [0]: https://linrunner.de/tlp/
Battery life of ThinkPad that supports Linux with TLP installed and properly configured will be very similar to Windows. And to address FUD from other reply to your question: AFAIK official Firefox builds for Linux use PGO as well, however PGO has quite less impact on battery life than what another commenter suggests.