To me, if you develop the problems early on, can test the battery, and aren't experienced at trying to charge it correctly(not just any old cook the battery and end it's life early for sure method)...then go ahead and replace it.
Even if the new battery goes out in 2 years, most are covered by free replacement, and you don't risk gambling that your alternator is constantly working on a fully discharged battery.
As for some other comments, some batteries(regardless of 'label') will have issues just sitting in a vehicle, especially in the summer. I imagine some dealers often inspect the batteries of each car every couple of weeks. If they didn't and a dud arose, how could they get average joe or jane to buy into investing thousands into a new car that showed signs(albeit battery related) or not wanting to start!?
I'm developing a bad cell in my current 2008 date stamped Die Hard 51. The vehicle typically uses 51R, and I'm looking at replacing it.
Why? It's a 1992 with an alternator that I don't know how long has been in service, but it costs $200.
So, do I pay $60-$135 for any range of batteries, or shave 1-2 years off of the alternator by being cheap?
Granted, some folks are really in a bind and have to make do. That is where properly knowing how to manually charge a battery and service it comes into play. If done wrong, the battery is worse off, if sulfation levels can be addressed without cooking the battery in the 'bad' way then perhaps you can squeeze more life out of it before any 1 cell becomes useless. That is a skill in of itself.