OP here. Thanks for all the advice! However, my itch never went away and last night I let my heart rule over my brain and proceeded with firmware update.
Surprisingly there were 2 consecutive updates. First one only went on for less than 2 mins, but the second one was a biggie. Took around 3 mins of download and then update went on for another heart-pounding 5 mins or so.
Risk was greater for me because there had been a power-cut earlier at night. Fortunately everything went smooth and I did not notice any problem afterwards.
I know that there were supposed to be no observable improvements through these updates, but for some reason I get a warm happy feeling inside when all my hardware has latest drivers and updates.