If being able to replace a part requires me to have a screwdriver (literally a Philips one should do), the component, and no additional PhD or bravery coming from youth, inexperience or both, I will welcome it with open arms.

Right now, having devices which require both expertise and expensive machinery means that the cost of going to someone to repair it will increase over 10 folds, making a full replacement a financial and sound choice.

If my CPU doesn't last for 10 years but I can change it myself in minutes, I would rather that than throwing away everything else I still love and is still functional just for promised extended reliability (which is just a matter of statistics and profit margins at the end of the day).