Only device I have is my oven that uses this kind of clock... but usually only winter/summer time alters this irrelevant to begin with. Not the mention a power outage sometimes and then months before it's set again.
Then again, what kind of more dependent systems or companies would have negative effects due to this? Besides bedside alarm clocks.
Heaters and similar high-draw industrial automation rely on a clock (which is not necessarily this clock - plus optionally another signal sent by the power provider over AC) to use off-peak (i.e. cheaper) power. Six minutes' running at peak power rates can get expensive at scale.
Then again, what kind of more dependent systems or companies would have negative effects due to this? Besides bedside alarm clocks.