It goes up and down.
Some seagate models have an extremely high failure rate, but not others.
Some western digital models have an extremely high failure rate, but not others.
Some hitachi models have an extremely high failure rate, but not others.
Etc etc.
They're all as bad as one another. And if you've ever opened up a hard disk and seen inside, as I'm sure most of you have, then you already know that it's a bloody wonder that they actually work at all.
Spinning rust's days are very close to being over, apart from a few niche applications such as high volume cold data.