Some runs of Apple hardware (well, any hardware) tends to have good and bad models. I tend to avoid any major hardware changes for the first 6mo and I've heard

Some runs of Apple hardware (well, any hardware) tends to have good and bad models. I tend to avoid any major hardware changes for the first 6mo and I've heard that advice for years. I've seen similar "bad luck" in first-world countries. So I don't think it's that. It's more likely a bad run of hardware or harsher working conditions (more humidity, not having a/c or something).