electrical glitches are fairly common in the first couple of years of service
electrical glitches are more common in the last couple of years of service
You are both correct, this is what is called the bathtub curve of reliability over age. Early teathing problems are sorted out after some time and the failure probability falls steeply to a bottom line. (Typically this is related to design and production flaws) Much later some aging problems start and the failure probability rises again, this time due to the fact that nothing lasts forever...
...like slide rules, carbon paper and vinyl records...