The main issue is that we're used to doing things a certain way. When something changes our usual habits, we get a bit confused because it's different from what we're accustomed to. For example, when we get a new phone. If we switch brands or upgrade, the phone's size may change. This can lead to pressing the wrong buttons, and even the power button might be in a new place, so we accidentally lower the volume instead! It's all about getting used to the new device, and this can take some time.

When it comes to new products, the main issue is getting used to them. Like, if the design or interface is different from what we're used to, it can be a bit tricky to adapt. Also, when there are new features or tech involved, it takes a while to get the hang of it, especially if they're advanced.