I have had many individual drives last decades at work and at home the problem is that the odds for failure are the same for each individual drive but if you have more drives the odds that YOU will see a failure increase.

It is like saying what are the odds or rolling a 1 on a 6 sided die

https://math.stackexchange.com/questions/1654073/probabilities-for-rolling-multiple-dice-and-getting-one-number-or-greater

1 16.67% 4 38.58%

So think of it like having a PC with one drive, vs having a NAS which typically has 4 drives. The more drives you have the more likely it is that you will see at least one failure during the life of the drive.

Camel Camel Camel has good data on this for several countries. Also differs by exact model

WDBWLG0180HBK-EESN (both up)

Germany

Canada

WDBWLG0180HBK-NESN (down)

Canada