Resetting the BIOS is essential sometimes, get into BIOS & F9 F10 is sufficient most of the time.

Recently I was at home and there was a bad storm and thunder & lightning & flash bang power cut.
That computer I could remove the CMOS battery for a while.

Also I have a small sized PC which has some kind of CMOS power supply inside but I suspect it is not removable, I have been reluctant to open it because I need to remove some stuck on rubber feet, but I think I will do.

Modern laptops usually don't have a separate CMOS battery but power from the main lithium battery and if you run that flat will reset BIOS but if you leave that lithium battery flat you will destroy it.
It is not difficult to carefully open a laptop and disconnect the battery.

Firstly, vulnerabilities is perpetual routine engineering.
I think browsers are quite questionable, personally I keyboard shortcut a password from a text editor.
For donkeys years I have a happy hobby of looking at Debian homepage Security Updates.
openssl is quite routine, even if you do not have openssl installed, you will definately have libssl3, and what else SSL and TLS?
What about frequently, libc6, libc-bin, libc-l10n, locales, tzdata etc?
I suppose that bandits can automatically (AI,) grab data on a colossal scale when openssl is perhaps significantly leaky.
I guess I could setup an e-mail alert for security updates and pipe a text message to my mobile phone.