[Lavaduck]

Let's say I hack someone and know absolutely everything about their computer, MAC address, ISP, DNS, everything, and successfully doxxed the target completely.

Can the target reset their computer and then keep on going with their life without worrying about being hacked again if their computer just sits on idle with an internet connection? What if they changed their router but it was provided by the same ISP?
What if their ISP and router changed completely?
Will they have to live with a VPN and maxed out firewall at all times?

I'd appreciate answers to each one of these questions to be completely informed.

[ALEDIO]

If you have already doxed this person it shouldn't matter to you if they change their network connection altogether or take precautions to prevent anyone from doing anything. Eventually this is also quite likely to happen and the only thing you can do at that point is try doxing it one more time, but you know that would loop forever. What is the need in the end if you have already obtained everything there is to know about your target?