Sometimes firmware updates make the system worse or even completely bricked. If the machine already working and stable, I've learned it's a risky / bad idea to eagerly apply firmware updates.
Flash media is cheap nowadays, and HP EliteBook series laptops store a couple of previous BIOS versions on board to make rollback possible. Also these higher end laptops can try previous version of their firmware if they fail to boot with the latest one.
Failing to see how Lenovo can't implement something like that.
Bad idea because firmware bugs are a growing attack vector and you are leaving yourself exposed to known, easily-exploited vulnerabilities by not staying up to date.
