It is to be applied with care, in the right situation, in order to find answers to specific problems. Laptop computers, unlike desktop machines, really do get used up. Lithium batteries are good for no more than 400 recharge cycles, sometimes much fewer. Keyboards wear out. LCD screen backlighting grows dim.
Mouse buttons fail.
We have heard of a machine used on the table in a train being shaken to unusability in one trip. It's difficult to give any recommendations for a certain laptop model in general. Your personal needs have to be taken into account. Also the market is changing very quickly. So I don't give any model or brand specific recommendations.