If I bought a bike and the hub wasn't deemed a great or reliable hub. I'd still ride on that hub till it bit the dust. Or showed signs of why it's not such a great hub. Which likely will be after many miles of use.

Considering to replace a hub on a new bike prior to purchase just seems foolish when you can usually go up a model tier or two and get better components all over the bike, including wheelset and hubs on the same frameset for less than what just upgrading the hub on that or any frameset will cost.